52.32% is the change from 539 to 821
Calculation steps:
[( 821 - 539 ) ÷ 539] x 100 = 52.32%
Formula
Percentage change = [(821 - 539) / 539] x 100
Subtract the new number by the original number
821 - 539 = 282
282 ÷ 539 = 0.5231910946196661
0.5231910946196661 x 100 = 52.32%