Question

to bake a cake , raffy needs 3 cups of sugar for 5 cups of flour. if he uses 35 cups of flour, how much sugar doe he need and how many cakes will he bake

Answer 1

Answer: 21 cups of sugar, 7 cakes

Solve the following proportion:

3/5=x/35

Cross multiply:

5x=35(3)

5x=105

x=21 cups of sugar

3 cups of sugar= 1 cake

21 cups of sugar= x cakes

Cross multiply:

3x=21

21/3

7 cakes