0.2% is the change from 509 to 510
Calculation steps:
[( 510 - 509 ) ÷ 509] x 100 = 0.2%
Formula
Percentage change = [(510 - 509) / 509] x 100
Subtract the new number by the original number
510 - 509 = 1
1 ÷ 509 = 0.0019646365422396855
0.0019646365422396855 x 100 = 0.2%