-6.83% is the change from 556 to 518
Calculation steps:
[( 518 - 556 ) ÷ 556] x 100 = -6.83%
Formula
Percentage change = [(518 - 556) / 556] x 100
Subtract the new number by the original number
518 - 556 = -38
-38 ÷ 556 = -0.0683453237410072
-0.0683453237410072 x 100 = -6.83%