Tom's rabbit can run at 25 miles per hour.  His cat can run 20 miles per hour.  The cat gets a 15-minute head start.  In hours, how long will it take for the rabbit to catch up?
The cat got a 15/60=<T>divide(15, 60)=0.25 hour head start
That means it ran 20*.25=<T>multiply(20, 0.25)=5.0 miles
The rabbit goes 25-20=<T>subtract(25, 20)=5 mph faster than the cat
So it takes 5/5=<T>divide(5, 5)=1.0 hour for the rabbit to catch up
