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

If he earns $10.50 per hour, add the number of hours he work and then divide by 10.50

First, add all of the working hours.

1 3/4 + 2 1/3 + 1 5/12

Since the denominators are different, make them on all the same.

1 9/12 + 2 4/12 + 1 5/12

Add everything up.

4 1/12 + 1 5/12

5 6/12

Simplify.

5 1/2 or 5.5

Multiply the time by the salary.

5.5*10.5=57.75

Doug earned 57.75$