Question

Joe walked four over nine of a mile in four over five of an hour. What is his unit rate in miles per hour?

Answer 1

four over nine of a mile in four over five of an hour 

= 4                      4
-----       /           ----
  9                       5

= 4                      5
-----      *           ----
  9                       4

= 20
-------
   36

= 5
-----
   9

answer is : four ninths over four fifths = five over nine mile per hour (first choice)