Question

Enrique drank 23⁄16 cups of coffee in 21⁄2 hours. How much coffee did he drink each hour?

A. 4⁄5 of a cup
  B. 515⁄32 cups
  C. 11⁄8 cups
  D. 7⁄8 of a cup

Answer 1

7/8 cup/hr (Answer D)

Explanation:

You're being asked to find the unit rate, the rate at which Enrique drank coffee each hour. Divide 2 3/16 cups by 2 1/2 hours:

2 3/16 cups 35 5

------------------- = ------- ÷ ------- = (35/16)*(2/5) = 70/80 cup/hr = 7/8 cup/hr

2 1/2 hours 16 2