Use reasoning to lead to the answer of the following question:
I run 12 miles in 90 minutes. What is my average speed in miles per hour?

8
First convert 90 minutes to hours: 90 minutes / 60 minutes / hours = 1.

5 hours.

In 1 hour, I run 12 miles / 1.

5 hours = 8 miles / hour.

.

Therefore, the answer is 8