On Friday night, John ate pizza for dinner and had 1/2 of the pizza left over. On Saturday, he ate 1/3 of what was left. How much pizza did John eat on Sunday?
Simplify your answer and write it as a proper fraction or as a whole or mixed number.
If john ate 1/2 on Friday, then there was a full half of pizza left when he finished. And if he ate 1/3 of what was left on Saturday, there was only 2/3 of the pizza left for him to eat. So he ate 2/3 of a pizza on Sunday