Nadine saw that there was 4/5 of a pie left after their family picnic. Each slice of pie was 1/15 of the total pie. How many slices of pie are left?

Given:

4/5 of a pie left after their family picnic.

Each slice of pie was 1/15 of the total pie.

To find:

The number of remaining slices of pie.

Solution:

Let x be the number of remaining slices of pie.

Part of total pie in one slice =

Remaining part of total pie in x slices =

According to the question, 4/5 of a pie left after their family picnic.

Using cross multiplication, we get

Divide both sides by 5.

Therefore, the remaining number of slices of pie is 12.

the correct answer would be c