Question

The teacher ended up getting 3 pizzas with 12 slices each. If the students ate 5/9 of the pizzas, how many slices are left

Answer 1

Explanation:

3 pizzas with 12 slices each meaning 3 x 12 which equals 36.

1/9 of this is 4 since 5/9 were eaten by the student 4 x 5 = 20 so in total 20 pizzas were eaten.

20 minus the original 36 is 16 so 16 pizzas are left.

Answer 2

16 slices

Explanation:

To find out how many slices are left, we can calculate the total number of slices in the pizzas and then subtract the portion that the students ate.

The teacher got 3 pizzas, and each pizza has 12 slices. So, the total number of slices in the pizzas is:

Total slices = 3 pizzas × 12 slices/pizza = 36 slices

The students ate
`(5)/(9)` of the pizzas, which means they consumed:

`\begin{aligned} \textsf{Eaten slices}\sf & = (5)/(9)* \textsf{ Total slices}\\\\ & = (5)/(9)*36\textsf{ slices }\\\\ & = 20 \textsf{slices} \end{aligned}`

Now, to find out how many slices are left, subtract the eaten slices from the total slices:

`\begin{aligned} \textsf{Slices left } & = \textsf{Total slices - Eaten slices }\\\\ &=\sf 36 \textsf{slices} - 20 \textsf{slices} \\\\ &=\sf 16 \textsf{slices} \end{aligned}`

So, there are 16 slices of pizza left.