A store bought jeans for $40 a pair and sold them for $70 a pair.

After a few weeks, the store manager put the jeans on sale at 15% off. What was the sale price?

0.85 * 70 = ?

To find the sale price of the jeans after applying a 15% discount, we need to subtract 15% of the original selling price from the original selling price itself.

Step 1: Calculate the amount of discount:
15% of $70 = (15/100) * $70 = $10.50

Step 2: Subtract the discount from the original selling price:
$70 - $10.50 = $59.50

Therefore, the sale price of the jeans after a 15% discount is $59.50.