12.99% is the change from 539 to 609
Calculation steps:
[( 609 - 539 ) ÷ 539] x 100 = 12.99%
Formula
Percentage change = [(609 - 539) / 539] x 100
Subtract the new number by the original number
609 - 539 = 70
70 ÷ 539 = 0.12987012987012986
0.12987012987012986 x 100 = 12.99%