91.03% is the change from 435 to 831
Calculation steps:
[( 831 - 435 ) ÷ 435] x 100 = 91.03%
Formula
Percentage change = [(831 - 435) / 435] x 100
Subtract the new number by the original number
831 - 435 = 396
396 ÷ 435 = 0.9103448275862069
0.9103448275862069 x 100 = 91.03%