Doug earn $10.50 per hour working at a restaurant. On Friday he spent 1 3/4 hours cleaning, 2 1/3 hours doing paper work and 1 5/12 hours serving customers. What were Doug earning

The best place to start in answering this question is to make all the fractions with the same denominator in order to add them easier.

Therefore, 1 3/4 = 1 9/12, 2 1/3 = 2 4/12, and 1 5/12.

Then you can add them together 1 + 1 + 2 = 4 and then 9/12 + 4/12 + 5/12 = 18/12 or 1 6/12 or 1.5. So he worked a total of 5.5 hours. Then you can multiply his hourly rate by 5.5 to find his total earnings. $10.50 * 5.5 = $57.75