31.72% is the change from 621 to 818
Calculation steps:
[( 818 - 621 ) ÷ 621] x 100 = 31.72%
Formula
Percentage change = [(818 - 621) / 621] x 100
Subtract the new number by the original number
818 - 621 = 197
197 ÷ 621 = 0.3172302737520129
0.3172302737520129 x 100 = 31.72%