SOLUTION: Rap/hip-hop music accounted for 10.7% of the total sales of recorded music in 1997, and 14.9% of the total sales of recorded music in 2007. Find the average rate of change of the p

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Question 1019794: Rap/hip-hop music accounted for 10.7% of the total sales of recorded music in 1997, and 14.9% of the total sales of recorded music in 2007. Find the average rate of change of the percentage of sales of rap/hip-hop music from 1997 to 2007.
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.
The average rate of change is ????% per year.
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
we are talking about a period of 10 years: 2007-1997=10 .
Over that time, the percentage change was
14.9-10.7=4.2 (an increase of 4.2%).
The yearly average rate of change of the percentage of sales of rap/hip-hop music was
4.2%2F10=highlight%280.42%29 .
That highlight%280.42%29 is the answer to be entered.

NOTE:
That cannot calculate the percent change in sales of rap/hip-hop music,
because we do not know absolute numbers of units sold. We only know how much rap/hip-hop music was sold as a percentage of total music sold.
It is possible that sales of rap/hip-hop music (and sales of music in general) decreased from 1997 to 2007.