PR.5B, SEC 2, % incr/dcrs calc (50)

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

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Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!

Hint

💡 Quick tip for finding a percentage multiplier.

To increase a number by 20% add the 20 to 100 first.

100 + 20 = 120.

Divide 120 by 100 to get the multiplier.

120 ÷ 100 = 1.2.

Multiplying any figure by 1.2 boosts it by 20% in one step.

Example: 50 × 1.2 = £60.

To decrease a number by 20% subtract the 20 from 100 instead.

100 − 20 = 80.

Divide 80 by 100 to get the multiplier.

80 ÷ 100 = 0.8.

Multiplying any figure by 0.8 chops off 20% quickly.

Example: 50 × 0.8 = £40.

Using multipliers means fewer buttons to press and fewer mistakes under exam pressure.

If you don’t have a calculator handy you can use your phone, but remember phones aren’t allowed in the real exam!