18.47% is the change from 509 to 603
Calculation steps:
[( 603 - 509 ) ÷ 509] x 100 = 18.47%
Formula
Percentage change = [(603 - 509) / 509] x 100
Subtract the new number by the original number
603 - 509 = 94
94 ÷ 509 = 0.18467583497053044
0.18467583497053044 x 100 = 18.47%