How is this possible?

Question

Andy, Lee, and Val each ate 2/3 of pizza. The pizzas were the same size, but Andy ate two pieces, Lee ate four slices, and Val ate six slices.

Answer 1

Andy ate 2 pieces = 2/3 of the pizza

Lee ate 4 pieces = 2/3 of the pizza

Val ate 6 pieces = 2/3 of the pizza

Lee's pieces are half as big as Andy's

Val's pieces are one third as big as Andy's

The 1/3 pizza left for each would be the same as 1 piece left for Andy, 2 piece left for Lee and 3 pieces left for Val.