-81.8% is the change from 555 to 101
Calculation steps:
[( 101 - 555 ) ÷ 555] x 100 = -81.8%
Formula
Percentage change = [(101 - 555) / 555] x 100
Subtract the new number by the original number
101 - 555 = -454
-454 ÷ 555 = -0.818018018018018
-0.818018018018018 x 100 = -81.8%