51.39% is the change from 539 to 816
Calculation steps:
[( 816 - 539 ) ÷ 539] x 100 = 51.39%
Formula
Percentage change = [(816 - 539) / 539] x 100
Subtract the new number by the original number
816 - 539 = 277
277 ÷ 539 = 0.5139146567717996
0.5139146567717996 x 100 = 51.39%