A car travels 1 6 of the distance between two cities in 3 5 of an hour. At this rate, what fraction of the distance between the two cities can the car travel in 1 hour?
Set this up as a proportion
(1/6)d / (3/5 h) = x / (1 hr) cross-multiply
(1/6)d (1 hr) = (3/5)hr (x) cancel the "hr" on each side
(1/6)d = (3/5) x multiply by 5/3 on both sides
(1/6)(5/3)d = x = (5/18)d in one hour
