Question

In a sale a clothes shop reduces its price by 40%.A shirt usually costs £20 how much is it in sale

Answer 1

I've made a table which may help to explain.
in %|£ percentage| Pounds
100 | 20 Given that 100% of the original price is 20 pounds
10 | 2 You should be able to subtract £8 from the £20
40 | 8
Finally giving you £12 for the shirt during the sale.

Answer 2

Do 10% first, and then times it by four, so 10% is £2 times 4 is £8, take it away from £20 is £12. Hope it helps