PR.5D, SEC 1, simple intrst (60)

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Don’t include this line!

Don’t include this line!

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick simple-interest facts.

Interest earned = principal × rate × time.

Principal is the starting amount you invest.

Rate must be the percentage written as a decimal multiplier (e.g. 7.5 % → 0.075).

Time is usually given in years—check the question.

Calculate the interest, then add it to the principal for the total amount.

Simple interest stays the same each year because it never compounds.

Compound interest is different: each year’s interest is added to the balance before the next calculation.

Write the formula, substitute carefully, and use your calculator to keep it tidy.

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).

Hint

💡 Quick percentage table tricks.

100 % is the whole amount.

10 % = whole ÷ 10.

1 % = whole ÷ 100.

Find 5 % by halving 10 %.

Use a percentage table (a layout lining up percentages with amounts) to mix and match rows fast.

Divide the bottom number by the top number in the same column to spot the scale factor.

Multiply the one-year interest by the number of years when the rate stays the same.

If the question wants the interest earned, stop there.

If it wants the total amount, add that interest to the principal (starting amount).