



 
Hi Sam, When you we the term percent we should specify the percent of what. In the situation you describe, where a quantity changes over time from one value to another the percent change is the change (difference) as a percent of the starting value. Your value was 3,202 in 2007 and changed to 3,626 in 2008 so the chance was 3,526  3,202 = 424. This value, 424 as a percentage of the staring value, 3,202 is
So the increase is 13.245 of the number of packages moved in 2007. I hope this helps,  


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