Question

Rap/hip-hop music accounted for 11.7% of the total sales of recorded music in 1998, and 13.9% of the total sales of recorded music in 2006 . Find the average rate of change of the percentage of sales of rap/hip-hop music from 1998 to 2006 .

Round to the nearest hundredth of a percent.

The average rate of change is what percent?

Answer 1

(13.9 - 11.7)/(2006 - 1998) = 2.2/8 = 0.275 = 0.28 %