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Question

A pharmaceutical company received $3 million in royalties on the first $20 million in sales of the generic equivalent of one of its products and then $9 million in royalties on the next $108 million in sales. By approximately, what percent did the ratio of royalties to sales decrease from the first $20 million in sales?

A
8%
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B
15%
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C
45%
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D
52%
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E
56%
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Solution

The correct option is D 45%
The ratio of royalties to sales for the first $20 million in sales is 320 and the ratio of royalties to sale for the next $108 million in sales is 9108=112.
The percent decrease in the royalties to sales ratio is 100 times the quotient of the difference in the ratios divided by the ratio of royalties to sales for the first $20 million in sales or
112320320×100=(112320)×203×100
=(112×2031)×100
=(591)×100
49×100
=0.44×100
=45% decrease
Hence, correct option is C.

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