Answer:
24% off
Explanation:
I found 25% off the sweater by doing 25 x .25 which gave me 6.25
If we subtract that from the original price, you get 18.75
We need $19, so we know the percentage has to be smaller than 25, but just barely.
Next I tried 25 x .24 which gave me 6.
25 - 6 = 19, so we know the percentage is 24%