To find the percent decrease in price, we can use the formula:
\[ \text{Percent Decrease} = \left( \frac{\text{Original Price} - \text{Sale Price}}{\text{Original Price}} \right) \times 100 \]
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Find the original price and the sale price:
- Original Price = $22.50
- Sale Price = $18.00
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Calculate the decrease in price: \[ \text{Decrease} = \text{Original Price} - \text{Sale Price} = 22.50 - 18.00 = 4.50 \]
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Substitute the values into the percent decrease formula: \[ \text{Percent Decrease} = \left( \frac{4.50}{22.50} \right) \times 100 \]
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Calculate the fraction: \[ \frac{4.50}{22.50} = 0.2 \]
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Convert this to a percentage: \[ 0.2 \times 100 = 20% \]
Thus, the percent decrease in price due to the sale is 20%.
The answer is B. 20%.
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