18.66% is the change from 509 to 604
Calculation steps:
[( 604 - 509 ) ÷ 509] x 100 = 18.66%
Formula
Percentage change = [(604 - 509) / 509] x 100
Subtract the new number by the original number
604 - 509 = 95
95 ÷ 509 = 0.18664047151277013
0.18664047151277013 x 100 = 18.66%