-9.19% is the change from 555 to 504
Calculation steps:
[( 504 - 555 ) ÷ 555] x 100 = -9.19%
Formula
Percentage change = [(504 - 555) / 555] x 100
Subtract the new number by the original number
504 - 555 = -51
-51 ÷ 555 = -0.0918918918918919
-0.0918918918918919 x 100 = -9.19%