Answer:
62. 84%
Step-by-step explanation:
total revenue of a company from music sales and licensing in 1999 = $14.8 billion
Foretasted total revenue of a company from music sales and licensing in 2014 = $5.5 billion
decrease in revenue of a company from music sales and licensing in 2014 from 1999 = $14.8 billion - $5.5 billion = 9.3 billion
Therefore percentage decrease in music revenue =( difference in revenue from 1999 to 2014/ revenue in 1999 ) * 100
percent decrease in music revenue is 62. 84%.