
There are 60 minutes in an hour, so a 2.5-hour movie is 2.5 x 60 = 150 minutes long.
John uses the bathroom every 50 minutes, so during a 150-minute movie, he will use the bathroom 150/50 = 3 times. 
#### 3
The answer is: 3
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
John uses the bathroom every 50 minutes.  How many times does he use the bathroom during a 2.5-hour movie?

### Answer:
