Problema Solution
The average monthly cell phone bill was $80.90 in 1990 and $49.98 in 2005. Find the percent decrease in price from 1990 to 2005.
Answer provided by our tutors
percentage decrease = (80.9-49.98)/80.9 *100
=30.92/80.9 *100
= 38.22
hence it decrease by 38.22%