30.73% is the change from 628 to 821
Calculation steps:
[( 821 - 628 ) ÷ 628] x 100 = 30.73%
Formula
Percentage change = [(821 - 628) / 628] x 100
Subtract the new number by the original number
821 - 628 = 193
193 ÷ 628 = 0.3073248407643312
0.3073248407643312 x 100 = 30.73%