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If the retail price of a shirt is R dollars, and the price including sales tax is T dollars then the sales tax, as a percent, is
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A.$$\frac{R(T-R)}{100}$$
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B.$$\frac{T-R}{100T}$$
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C.$$\frac{100T-R}{T}$$
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D.$$\frac{T-100R}{T}$$
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E.$$100\frac{T-R}{R}$$
E显示答案
