51.58% is the change from 539 to 817
Calculation steps:
[( 817 - 539 ) ÷ 539] x 100 = 51.58%
Formula
Percentage change = [(817 - 539) / 539] x 100
Subtract the new number by the original number
817 - 539 = 278
278 ÷ 539 = 0.5157699443413729
0.5157699443413729 x 100 = 51.58%