percent decrease : (original number - new number) / original number.......x 100
percent increase : (new number - original number) / original number.....x 100
2. so it went from 8700 to 6400...so it is a percent decrease
decrease : (original number - new number) / original number...x 100
decrease : (8700 - 6400) / (8700) = 2300 / 8700 = 0.264
we multiply that by 100 to get the percent = 26.4%
