Use reasoning to lead to the answer of the following question:
Simone ate 1/2 of an apple each day for 16 days. Lauri ate 1/3 of an apple each day for 15 days. How many apples did the two girls eat altogether?

13
Simone = (1 / 2) * 16 = 8.

Lauri = (1 / 3) * 15 = 5.

8 + 5 = 13.

Together they ate 13 apples.

.

The answer is 13