50.83% is the change from 539 to 813
Calculation steps:
[( 813 - 539 ) ÷ 539] x 100 = 50.83%
Formula
Percentage change = [(813 - 539) / 539] x 100
Subtract the new number by the original number
813 - 539 = 274
274 ÷ 539 = 0.5083487940630798
0.5083487940630798 x 100 = 50.83%