How many pieces of pizza would I eat if the serving size is 1/3?

I’m doing weight watchers and I need to know how much of the pizza I would eat for the 1/3 serving size.

The pizza was cut into 8 pieces and I ate 2 slices so I was wondering… If the pizza was cut into 8 slices, what is 1/3 of that?

2 slices and 2/3 of another slice will be 1/3 of the pizza.

1/3 of a pizza