Clarence ran 15 miles in 120 minutes. If he always runs at the same speed,how long will it take him to run 6 miles? How fast does Clarence run per mile?
If you do 120 divided by 15 you will get 8, which means he runs a mile in 8 minutes. From there you can conclude that it takes him 48 minutes to run 6 miles and he (again) runs a mile in 8 minutes.