18.9% is the change from 508 to 604
Calculation steps:
[( 604 - 508 ) ÷ 508] x 100 = 18.9%
Formula
Percentage change = [(604 - 508) / 508] x 100
Subtract the new number by the original number
604 - 508 = 96
96 ÷ 508 = 0.1889763779527559
0.1889763779527559 x 100 = 18.9%