Need help with a math problem

Question

The population of a city increased from 3900 in 2008 to 5200 in 2011. Find the absolute and relative (percent) increase.

absolute increase ?

relative increase?

Answer 1

3900 to 5200 is an absolute increase of 5200-3900= 1300

it's an absolute increase over a 3 year period, 2011-2008= 3

the absolute annual increase = 1300/3 = 433 1/3 per year

1300/3900 = 1/3 = 0.333... = 33 1/3 % relative increase = percentage increase

it increased 33 1/3 % over a 3 year period

33 1/3%/3 = 11 1/9% relative increase per year