To calculate the percentage markup, you can use the following formula:
\[ \text{Percentage Markup} = \left( \frac{\text{Selling Price} - \text{Cost Price}}{\text{Cost Price}} \right) \times 100 \]
In this case, the cost price is $17.45, and the selling price is $22.95.
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Calculate the difference between the selling price and the cost price: \[ 22.95 - 17.45 = 5.50 \]
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Now, use the formula to find the percentage markup: \[ \text{Percentage Markup} = \left( \frac{5.50}{17.45} \right) \times 100 \]
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Calculate the fraction: \[ \frac{5.50}{17.45} \approx 0.3155 \]
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Convert the fraction to a percentage: \[ 0.3155 \times 100 \approx 31.55 \]
Therefore, the percentage markup is approximately 31.55%.