9.04% is the change from 509 to 555
Calculation steps:
[( 555 - 509 ) ÷ 509] x 100 = 9.04%
Formula
Percentage change = [(555 - 509) / 509] x 100
Subtract the new number by the original number
555 - 509 = 46
46 ÷ 509 = 0.09037328094302555
0.09037328094302555 x 100 = 9.04%