Question

If John runs 2/5 of of mile in 3 minutes, How long will it take John to run 3 miles?

Answer 1

(2/5) / 3 = 3/x

(2/5)x = 9

x = 9 / (2/5)

x = 9 * (5/2)

x = 45/2 = 22.5 minutes