What percent discount?
You learn to work out what percentage discount you get.
How to work it out
- Work out how much money comes off: old price minus new price.
- Write it as a fraction: what comes off on top, the old price underneath.
- Make it hundredths: the number over 100 is the percentage.
Way 1: first work out the discount in money.
£50 − £35 = £15 discount
50
5
15
100
10
30
£15 = 30%
Way 2: what percentage is the new price?
50
5
35
100
10
70
£35 (new price) = 70%
So the discount is 100% − 70% = 30%
First £50, now £35. What percentage discount is that?
- Write down what you know: £50 is 100%.
- Way 1: £50 − £35 = £15 discount.
- £5 is 10%, so £15 is 30%.
- Way 2: £35 is 70% of £50, so the discount is 100% − 70% = 30%.
More examples
First £50, now £40. What percentage discount is that?
- Work out what comes off: 50 − 40 = 10 pounds.
- Write it as a fraction: 1050 = 15.
- Make it hundredths: 15 = 20100.
- It is 20% discount.
First £300, now £210. What percentage discount is that?
- Work out what comes off: 300 − 210 = 90 pounds.
- Write it as a fraction: 90300 = 310.
- Make it hundredths: 310 = 30100.
- It is 30% discount.