19.45% is the change from 509 to 608
Calculation steps:
[( 608 - 509 ) ÷ 509] x 100 = 19.45%
Formula
Percentage change = [(608 - 509) / 509] x 100
Subtract the new number by the original number
608 - 509 = 99
99 ÷ 509 = 0.1944990176817289
0.1944990176817289 x 100 = 19.45%