31.99% is the change from 622 to 821
Calculation steps:
[( 821 - 622 ) ÷ 622] x 100 = 31.99%
Formula
Percentage change = [(821 - 622) / 622] x 100
Subtract the new number by the original number
821 - 622 = 199
199 ÷ 622 = 0.319935691318328
0.319935691318328 x 100 = 31.99%