54.17% is the change from 539 to 831
Calculation steps:
[( 831 - 539 ) ÷ 539] x 100 = 54.17%
Formula
Percentage change = [(831 - 539) / 539] x 100
Subtract the new number by the original number
831 - 539 = 292
292 ÷ 539 = 0.5417439703153989
0.5417439703153989 x 100 = 54.17%