Question

A recipe uses 5/8kg of flour to make 10 cakes. How much is needed to make 30 cakes?

Answer 1

10 cakes required  5/8 kg of flour.

1 cake would require    (5/8) /10 = 5/8 * 1/10 = 1/16  kg of flour

30 cakes would then require  =    30 * 1/16 = 30/16 =  15/8 kg

30 cakes would require 15/8 kg of flour.