-8.65% is the change from 555 to 507
Calculation steps:
[( 507 - 555 ) ÷ 555] x 100 = -8.65%
Formula
Percentage change = [(507 - 555) / 555] x 100
Subtract the new number by the original number
507 - 555 = -48
-48 ÷ 555 = -0.08648648648648649
-0.08648648648648649 x 100 = -8.65%