Answer: 22% (B)
Explanation: To find the percentage that was deducted, you would first change all of the percentages to a decimal (move the decimal two places to the left). For example, 21% would be .21, 22% would be .22, etc. Then, multiply 378.18 by .21, .22, .23, and .24 until you find an answer that rounds to 83.20. 378.18 * .21 is $79.4178 so that cannot be the answer. However, 378.18 * .22 is 83.1996. Round that and you get 83.2. Therefore, the answer is B.
