19.88% is the change from 508 to 609
Calculation steps:
[( 609 - 508 ) ÷ 508] x 100 = 19.88%
Formula
Percentage change = [(609 - 508) / 508] x 100
Subtract the new number by the original number
609 - 508 = 101
101 ÷ 508 = 0.19881889763779528
0.19881889763779528 x 100 = 19.88%