81.84% is the change from 457 to 831
Calculation steps:
[( 831 - 457 ) ÷ 457] x 100 = 81.84%
Formula
Percentage change = [(831 - 457) / 457] x 100
Subtract the new number by the original number
831 - 457 = 374
374 ÷ 457 = 0.8183807439824945
0.8183807439824945 x 100 = 81.84%