8.06% is the change from 509 to 550
Calculation steps:
[( 550 - 509 ) ÷ 509] x 100 = 8.06%
Formula
Percentage change = [(550 - 509) / 509] x 100
Subtract the new number by the original number
550 - 509 = 41
41 ÷ 509 = 0.08055009823182711
0.08055009823182711 x 100 = 8.06%