Ron had 20 apples. He used 2/5 of the apples to make pies. How many apples did Ron use for pies?
1/5 of 20 is 4.
2/5 of 20 is 8.
Therefore, Ron used 8 apples to make his pies.
Ron used 8 apples for his pies. 20/5=4 so 4 times 5 equals 20 and if you multply by 4 on one side you have to multiply by 4 on the other. And 4 times 2 equals 8.