-0.18% is the change from 555 to 554
Calculation steps:
[( 554 - 555 ) ÷ 555] x 100 = -0.18%
Formula
Percentage change = [(554 - 555) / 555] x 100
Subtract the new number by the original number
554 - 555 = -1
-1 ÷ 555 = -0.0018018018018018018
-0.0018018018018018018 x 100 = -0.18%