John decided to order one pizza. He ate 23 of the pizza and he gave 16 of it to his sister.
Find how much pizza is left with John.
1/6
Amount of pizza eaten by John = 23
Amount of pizza given to his sister = 16
So, total pizza eaten by John and his sister = 23+16
= 4+16
= 56
Therefore, Amount of pizza left with John = 1 - 56
= 66−56 = 16