Question

16 Compare Dawn earned $97.50 for 10 hours of work. Amy earned $120 for 12 hours

of work. How much did each person earn per hour? How can you use this information
to compare their earnings?
Curriculum Associates, Copy
16
Lesson 2 Understand Unit Rate

Answer 1

Dawn earns $9.75 per hour while Amy earns $10 per hour.

This information is important in comparing who is actually earning more than the other. Amy is earning $0.25 more than Dawn is earning. Thus, working for an extra 2 hours than Dawn made her earn $22.5 more than Dawn earned in a week.

Explanation:

You can get the hourly work rate of Dawn and Amy by dividing their total earnings to the number of hours they worked.

• Dawn = $97.50 ÷ 10 = $9.75
• Amy = $120 ÷ 12 = $10

You can get the difference in hourly rate by subtracting Dawn's earning from Amy's earning.

• $10 - $9.75 = $0.25

You can also get the difference in their weekly earnings by subtracting Dawn's total weekly earning from Amy's total weekly earning.

• $120 - $97.50 = $22.5