Answer: The percent of markup on each stereo is 78 %
Explanation:
We are given:
Original cost of each stereo = $102.30
Selling price of each stereo = $181.99
Markup amount on each stereo = ($181.99 - $102.30) = $79.69
To calculate the percent of markup, we use the equation:

Putting values in above equation, we get:

Hence, the percent of markup on each stereo is 78 %