A MP3 player is marked up by 10% and then marked down by 10% what is the final price?
initial price = p
marked up is 1.1 p
then marked down is .9(1.1) p
= .99 p
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To calculate the final price of an item that has been marked up and then marked down, you can follow these steps:
1. Let's assume the initial price of the MP3 player is $100.
2. To calculate the first markup, increase the price by 10%. This can be done by multiplying the initial price by 1 plus 10% (or 0.1). In this case, the price after the markup would be: $100 * (1 + 0.1) = $100 * 1.1 = $110.
3. Next, calculate the markdown by decreasing the price by 10%. This can be done by multiplying the price after the markup by 1 minus 10% (or 0.1). In this case, the price after the markdown would be: $110 * (1 - 0.1) = $110 * 0.9 = $99.
4. Therefore, the final price of the MP3 player after being marked up and then marked down would be $99.
So, the final price of the MP3 player is $99.