Ethan had 7 of his friends over. He ordered cheese pizzas and mozzarella sticks for the 8 of them. In all, there were 64 pieces of food. If each person had 5 slices of pizza, find the number of mozzarella sticks each person ate.
Each person ate ___ mozzarella sticks
There were 8 people at the party and each person ate at least 5 pieces of pizza, so there were 8*5 = <<8*5=40>>40 pieces of pizza eaten.
If there were 64 pieces of food and 40 pieces were pizza, there were 64-40 = <<64-40=24>>24 mozzarella sticks eaten.
If there were 8 people, then each person ate 24 mozzarella sticks / 8 people = <<24/8=3>>3 mozzarella sticks. Answer: \boxed{3}.