Question

5 cakes cost £2.50 how much do 7 cakes cost?

Answer 1

1 cake cost =2.50 divide by 5 = 0.50p

7 cakes cost = 50p times 7 =  £3.50

answer = £3.50

Answer 2

7 cakes cost $4.20 . You do 2.50/5 then multiply by 7