2% is the change from 499 to 509
Calculation steps:
[( 509 - 499 ) ÷ 499] x 100 = 2%
Formula
Percentage change = [(509 - 499) / 499] x 100
Subtract the new number by the original number
509 - 499 = 10
10 ÷ 499 = 0.02004008016032064
0.02004008016032064 x 100 = 2%