Eight cakes cost 4.00. how much do three cakes cost?

Three cakes equals $1.50

because ...

8 divided by $4.00 equals 2

so 3 divided by 2 equals $1.50

8 cakes ... 4.00

3 cakes ... x = ?

If you would like to know how much do 3 cakes cost, you can calculate this using the following steps:

8 * x = 4 * 3

8 * x = 12 / 8

x = 12/8

x = 3/2 = 1.5

The correct result would be 1.5.