Answer:
By the end of the day Wednesday, she had delivered 80%.
Monday alone was 32%, Tuesday alone was 28%, and Wednesday alone was 20%.
Explanation:
20 x
----- = -----
25 100
2000 / 25 = 80% (the three days together)
Set up the same proportion to show Monday, Tuesday and Wednesday's percentages:
32%, 28% and 20% respectively. (32 + 28 + 20 = 80)