52.13% is the change from 539 to 820
Calculation steps:
[( 820 - 539 ) ÷ 539] x 100 = 52.13%
Formula
Percentage change = [(820 - 539) / 539] x 100
Subtract the new number by the original number
820 - 539 = 281
281 ÷ 539 = 0.5213358070500927
0.5213358070500927 x 100 = 52.13%