-2.16% is the change from 509 to 498
Calculation steps:
[( 498 - 509 ) ÷ 509] x 100 = -2.16%
Formula
Percentage change = [(498 - 509) / 509] x 100
Subtract the new number by the original number
498 - 509 = -11
-11 ÷ 509 = -0.021611001964636542
-0.021611001964636542 x 100 = -2.16%