-0.19% is the change from 518 to 517
Calculation steps:
[( 517 - 518 ) ÷ 518] x 100 = -0.19%
Formula
Percentage change = [(517 - 518) / 518] x 100
Subtract the new number by the original number
517 - 518 = -1
-1 ÷ 518 = -0.0019305019305019305
-0.0019305019305019305 x 100 = -0.19%