7.79% is the change from 539 to 581
Calculation steps:
[( 581 - 539 ) ÷ 539] x 100 = 7.79%
Formula
Percentage change = [(581 - 539) / 539] x 100
Subtract the new number by the original number
581 - 539 = 42
42 ÷ 539 = 0.07792207792207792
0.07792207792207792 x 100 = 7.79%