Question

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?

Answer 1

`1/30` of a pizza was not eaten

Explanation:

Amount of pizzas eaten:
`color(white)("XXX")1 1/2+2/3+4/5`

(converting to common denominator)
`color(white)("XXX")=45/30 +20/30+24/30`

`color(white)("XXX")=89/30`

Amount of pizza bought:
`color(white)("XXX")3 = 90/30`

Amount of pizza not eaten
`color(white)("XXX")90/30-89/30=1/30`