Kayeigh and rachel each buy clothes in the sale. kayleigh's clothes normally cost £50 but had £5 off . rachel's clothes normally cost £20 but had £3 off . who's clothes had the biggest percentage discount

(5/50) x 100 = 10%
(3/20) x 100 = 15%
So Rachel has the biggest discount

Kaleighs clothes : 

£50=100%
so to find one percent you divide by 100
£0.5=1%
if you then do how much of (£5) by one percent which is (£0.5)
then you get 
5 divided by 0.5 to get 10
which means kaleighs clothes are 10% off 

mimick this idea for Rachels clothes and the greater the percentage, shows whos clothes had the biggest percentage discount