-24.32% is the change from 555 to 420
Calculation steps:
[( 420 - 555 ) ÷ 555] x 100 = -24.32%
Formula
Percentage change = [(420 - 555) / 555] x 100
Subtract the new number by the original number
420 - 555 = -135
-135 ÷ 555 = -0.24324324324324326
-0.24324324324324326 x 100 = -24.32%