To solve this problem, we need to find the amount of earnings per hour of employees A, B, and C. To do this, we need to divide the total earnings (in dollars) by the hours of work they completed. This is called finding the unit rate, or earnings/hr.
For Employee A, this would be $180/15 hours, or $12/hour.
For Employee B, this would be $210/20 hours, or $10.50/hour.
For Employee C, this would be $455/35 hours, or $13/hour.
In general, these are just simple division problems after you set them up. To set up these types of problems, just make sure you divide the correct way (earnings divided by hour, not the other way around) by checking the units in the answer (you must end up with an answer in $/hour).
Hope this helps!