On Monday, students at a summer camp spent 4 hours 25 minutes at the pool learning to swim. In the morning, they spent 2 hours 48 minutes at the pool. How long did the students spend at the pool in the afternoon?

4 hours and 25 minutes simplifies to 265 minutes

2 hours and 48 minutes simplifies to 168 minutes

Subtract the numbers: 265-168 = 97 minutes left

Convert back to hours and you have 1 Hour 37 minutes at the pool in the afternoon.