15 campers went rowing in the morning. Some more campers went rowing in the afternoon. If a total of 32 campers went rowing that day how many campers went rowing in the afternoon?
First, we need to find how many campers went rowing in the morning. 15 campers went rowing in the morning, so we can say that 15 campers went rowing in the morning. 

Next, we need to find how many campers went rowing in the afternoon. A total of 32 campers went rowing that day, and we already know that 15 campers went rowing in the morning, so 32 - 15 = 17 campers went rowing in the afternoon. 

Therefore the answer (numeric) is: 

17