Question

Joe has some pocket money. He spends 90% of it. He has 50p left. How much pocket money did he have?

Answer 1

So he spent 90% of a number and had 50 left
£5. This is because 50p is 10%. To get 100% you therefore need to times 50p by 10, thus getting £5
Hope this helps!

Answer 2

He had 500 pocket money!