Matthias H. answered 06/05/19
Passionate Math, Science tutor who loves sharing his knowledge.
You know that $80 corresponds to 40% off. You want to know what $ amount corresponds to 100%.
1) figure-out what dollar amount corresponds to 1% off: 1% off = $80 / 40 = $2.
2) multiply $2 by 100, to get from 1% to 100%. So the original price was $200.
3) Holly paid $200 (original price) - $80 (discount) = $120 for the sweater.