Answer:
He had 3
pies left when he got home.
Step-by-step explanation:
Amount of pies left = 4 -
We would want to make everything have the same denominator so I am turning 4 into
so that it is easier to calculate.
4 -
=
- 
Now that the denominators are both 5, we can evaluate the numerators while leaving the denominators alone.
-
=
Then, we can leave the answer in mixed numbers simplest form.
= 3
Thus, he had 3
pies left when he got home.