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Mathematics 9 Online
OpenStudy (anonymous):

Rock music accounted for 31.5% of the total sales of recorded music in 1995 , and 22.8% of the total sales of recorded music in 2003 . Find the average rate of change of the percentage of sales of rock music from to . Round to the nearest hundredth of a percent. Note that the percentage sign is already given in the answer, so you do not need to enter it.

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