Sorry this is a newbie question but I'm not used to working with numbers. I have graduation rate data for states over several years, showing the average graduation rate for schools in those states. I'm trying to compare the states against one another and show how they've changed over time.
Does it make more sense to do this by comparing the direct scores, the percent change over years, or the percent point change?
California - Averages 2014: 86.69230769% 2015: 85.46153846% 2016: 85.30769231% California - Pct. point difference 2014-2015: -1.23076923 pct. pts. 2015-2016: -0.15384615 pct. pts. California - Pct. change 2014-2015: -1.42% 2015-2016: -0.18%