John manages to run 15 mph for his whole 5-mile race.  The next fastest guy ran the race in 23 minutes.  How many minutes did he win the race by?
He runs the race in 5/15=1/3 of an hour
So he runs the race in 60/3=<T>divide(60, 3)=20.0 minutes
That means he beat the next fastest guy by 23-20=<T>subtract(23, 20)=3 minutes
