31.57% is the change from 624 to 821
Calculation steps:
[( 821 - 624 ) ÷ 624] x 100 = 31.57%
Formula
Percentage change = [(821 - 624) / 624] x 100
Subtract the new number by the original number
821 - 624 = 197
197 ÷ 624 = 0.3157051282051282
0.3157051282051282 x 100 = 31.57%