The original price of the boots can be represented by the variable p. Since the boots are on sale for 15% off, the sale price can be represented by:
p - 0.15p = 0.85p
This means that the sale price is 85% of the original price. We know that Jenny bought the boots for $85, so we can set up the equation:
0.85p = 85
Solving for p, we get:
p = 100
Therefore, the original price of the boots was $100. To find out how much Jenny paid for the boots with the 15% discount, we can subtract the discount from the original price:
100 - 0.15(100) = 85
So Jenny paid $85 for the boots after the 15% discount.