Final answer:
To find the original price of the pants with a 20% discount, divide the sale price by (1 - discount percentage). The original price of the pants is $19.
Step-by-step explanation:
To find the original price of the pants, we can use the formula:
Original price = Sale price / (1 - Discount percentage)
Given the sale price is $15.20 and the discount is 20%, we can plug these values into the formula:
Original price = $15.20 / (1 - 0.20) = $15.20 / 0.80 = $19
Therefore, the original price of the pants was $19.