Answer:
Number of hours she worked so far = 15 hours
Explanation:
Total hours scheduled to work this week = 20 hours
Percentage of Hours worked so far = 75%
How many hours has she worked so far this week?
Number of hours she worked so far = 75% of 20 hours
= 75/100 * 20
= 0.75 * 20
= 15
Number of hours she worked so far = 15 hours