Some friends are sharing some pizzas. They buy 3 pizzas altogether. John eats 1 1/2 pizza, Peter eats 2/3 of the pizza and Kellie eats 4/5 of a pizza. How much pizza is not eaten?

Nov 14, 2016

$\frac{1}{30}$ of a pizza was not eaten

Explanation:

Amount of pizzas eaten:
$\textcolor{w h i t e}{\text{XXX}} 1 \frac{1}{2} + \frac{2}{3} + \frac{4}{5}$

(converting to common denominator)
$\textcolor{w h i t e}{\text{XXX}} = \frac{45}{30} + \frac{20}{30} + \frac{24}{30}$

$\textcolor{w h i t e}{\text{XXX}} = \frac{89}{30}$

Amount of pizza bought:
$\textcolor{w h i t e}{\text{XXX}} 3 = \frac{90}{30}$

Amount of pizza not eaten
$\textcolor{w h i t e}{\text{XXX}} \frac{90}{30} - \frac{89}{30} = \frac{1}{30}$