Joe,

To get the price after a 25% markup you multiply $300 by 1.25 which gives $300 × 1.25 = $375. You want to know what price you should charge so that a 15% decrease on that price gives $375, that is 85% of the sticker price should be $375. Suppose the sticker price is $p then

0.85 × $p = $375

or

$p = $375/0.85 = $441.18.

441.18/300 = 1.4706 so the lets round off and say the initial markup is 47%. This gives

$300 × 1.47 = $441 as the sticker price.

A discount of 15% gives the sale price as

0.85 × $441 = $374.85.

Harley