Question

Aron bought 3 pizzas, each with 12 slices. He and his friends ate 1 and two thirds of the pizzas.
a) How many slices were left?
b) How many pizzas were left?

Answer 1

21.6 slices

and

1.8 pizzas were left

here's how, 3*12 is 36
1 and 2/3 is the same as 1.6666666666
so 36/1.6666666666 is 21.6

now you take 21.6 (slices left) and divide it by 12 to find how many pizzas are left, so 21.6/12 is 1.8 (pizzas left)

Answer 2

That's wrong

Answer 3

To find the slices we:
(1) Multiply 3 by 12 = 36
(2) Change the mixed fraction into an improper fraction = 5/3
(3) Multiply the fraction by 12 => 5/3 * 12 = 20
(4) Minus 20 from 36 to get 16 slices as your answer.

To find the pizza leftover we just:
(1) Minus 5/3 from 3 = 4/3
(2) Change that into a mixed fraction to get 1 1/3 as the leftover pizzas.

Answer 4

Given one Pizza has 12 slices
3 pizzas has 3×12=36 slices
Also given that 1 and 2/3 of pizzas were eaten by him and his friend.
They ate 2/3 of 24 slices [Since one full pizza was already eaten.]
2/3×24=16
Slices left over is 24-16=8 pieces