51.02% is the change from 539 to 814
Calculation steps:
[( 814 - 539 ) ÷ 539] x 100 = 51.02%
Formula
Percentage change = [(814 - 539) / 539] x 100
Subtract the new number by the original number
814 - 539 = 275
275 ÷ 539 = 0.5102040816326531
0.5102040816326531 x 100 = 51.02%