Hello!
First, let's multiply the amount of money Debra is paid hourly ($7.50) by the number of hours she worked that week (24).
7.50 × 24 = 180
So, excluding tips, Debra earned $180 that one week. To find out how much she must receive in tips to earn more than $250 in that week, we must subtract the money she earned during that week from 250.
250 - 180 = 70
A N S W E R:
Debra must earn more than $70 in tips that week.