college algebra
posted by debbie .
From 1988 to 2008 average annual tuition and fees at public colleges increased from $525 to $5500. Calculate the percent change over this time period.
How do I set this up and solve it?
Thanks for your help:)

% change is the increase divided by the initial value.
For example, changing from 10 to 11 is an increase of 1110=1, so that's a 1/10=10% change.
(5500525)/525 = 9.476 = 947.6% increase