13.2% is the change from 538 to 609
Calculation steps:
[( 609 - 538 ) ÷ 538] x 100 = 13.2%
Formula
Percentage change = [(609 - 538) / 538] x 100
Subtract the new number by the original number
609 - 538 = 71
71 ÷ 538 = 0.13197026022304834
0.13197026022304834 x 100 = 13.2%