(3 2/5) / (7/8) = x / 1...3 2/5 miles to 7/8 hr = x miles to 1 hr
cross multiply
(7/8)(x) = (17/5)(1)....I turned 3 2/5 to an improper fraction 17/5
7/8x = 17/5
x = (17/5) / (7/8)
x = 17/5 * 8/7
x = 136/35 or 3 31/35 miles per hr.....or as a decimal, 3.89 miles per hr
