the fraction of the number of portable media players sold in 2008 to those sold in 2011 = 5/8
Step-by-step explanation:
The number of portable media players sold in 2008 = 100 millions
The number of portable media players sold in 2011 = 160 millions
The fraction of media players sold in 2008 to number sold in 2011
= 100million/160 million
= 5/8
Hence, the fraction of the number of portable media players sold in 2008 to those sold in 2011 = 5/8