Answer:
he has 1/6 of a piza left
Explanation:
becuase if you take the left over pizza, 3/4 it is bacially only a quarter of the piza gone, if image a pizza half of the circle is there, and half of the half circle is also there, and that is 3 sections, 6 d 3 get along, so ecaily each of the 3 section are wroth 2 slices and he ate 5, so 1 is left.