Luke travelled 12 2/3 miles in 1 hours and 40 minutes. What was his average rate of speed in miles per hour?  Choose the correct choice from the following options
A) 7  B) 7 3/5  C) 8 1/5  D) 9  E) 9 2/5
D = 12(2/3) = 38/3   T = 1(2/3) = 5/3   S = D/T = 7 3/5   Answer = 7 3/5
<result>B</result>
Luke travelled 12 2/3 miles in 1 hours and 40 minutes. What was his average rate of speed in miles per hour?