Answer: To find the selling price of the karaoke machine with a 49.5% markup, you need to first calculate the amount of the markup. You can do this by multiplying the cost of the machine (52.75) by the markup rate (49.5%) expressed as a decimal:
52.75 * 0.495 = 26.067375
Next, add this markup amount to the cost of the machine:
52.75 + 26.067375 = 78.817375
So, the selling price of the karaoke machine with a 49.5% markup would be $78.82.
Explanation: