33.39% is the change from 623 to 831
Calculation steps:
[( 831 - 623 ) ÷ 623] x 100 = 33.39%
Formula
Percentage change = [(831 - 623) / 623] x 100
Subtract the new number by the original number
831 - 623 = 208
208 ÷ 623 = 0.33386837881219905
0.33386837881219905 x 100 = 33.39%