Bob, a marathon runner, is preparing for a race.  He runs a total of 70 miles in the 3 days leading up to the race. On day one he runs 20 percent of the total miles and on day 2 he runs 50 percent of the remaining miles.  How many miles does he run on day three to complete the 70 miles?
Day 1: 70(.20)=<T>multiply(70, 0.2)=14.0 miles
70-14=<T>subtract(70, 14)=56 miles remaining
Day 2:56/2=<T>divide(56, 2)=28.0 miles
56-28=<T>subtract(56, 28)=28 miles remaining
