Question

over the course of 4 yrs, the value of a car decreases from $25000 to 15000. What is the average yearly percent of change?

Answer 1

First look at the overall change, how much did it decrease in value over 4 years?

Answer 2

it decreased by $10,000

Answer 3

so, it decreased by $2500 each of those four years (10,000/4)

Answer 4

now what?

Answer 5

Divide that by your original value and you're set :) Nice job.

For more detail: http://math.about.com/od/prealgebr1/a/percent.htm

Answer 6

thks