31.56% is the change from 621 to 817
Calculation steps:
[( 817 - 621 ) ÷ 621] x 100 = 31.56%
Formula
Percentage change = [(817 - 621) / 621] x 100
Subtract the new number by the original number
817 - 621 = 196
196 ÷ 621 = 0.31561996779388085
0.31561996779388085 x 100 = 31.56%