17.68% is the change from 509 to 599
Calculation steps:
[( 599 - 509 ) ÷ 509] x 100 = 17.68%
Formula
Percentage change = [(599 - 509) / 509] x 100
Subtract the new number by the original number
599 - 509 = 90
90 ÷ 509 = 0.17681728880157171
0.17681728880157171 x 100 = 17.68%