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.