Question

5 cakes cost £4 how much do 7 cakes cost

Answer 1

£5.60

divide £4 by 5 to obtain the cost of 1 cake then multiply this value by 7 for the cost of 7 cakes

5 → £4

7 → £4 × $\frac{7}{5}$ = £5.60

Answer 2

You can solve this using proportion.

5 = 4

7 = ?

7(4)/5= 5.6

7 cakes cost £5.6