Question

Jeff has 1/2 pizza left in the fridge . at breakfast he ate 1/3 of it. what fraction of the original pizza dose he have left for lunch?

Answer 1

(1-1/2)=1/2
(1/2)-(1/3)=1/6
This leaves Jeff with 1/6 of the original pizza.

Answer 2

Subtract 1/2 - 1/3

Convert into denominators of 6:

3/6 - 2/6 = (3-2)/6 = 1/6

So he will have 1/6 of pizza left for lunch.