Harold had 100 marbles. He kept 20 marbles and shared the rest evenly among his 5 friends. How many marbles did each friend get?
Harold shared 100 - 20 = <T>subtract(100, 20)=80 marbles with his friends.
Therefore, his 5 friends got 80/5 = <T>divide(80, 5)=16.0 marbles each.
