-90.24% is the change from 420 to 41
Calculation steps:
[( 41 - 420 ) ÷ 420] x 100 = -90.24%
Formula
Percentage change = [(41 - 420) / 420] x 100
Subtract the new number by the original number
41 - 420 = -379
-379 ÷ 420 = -0.9023809523809524
-0.9023809523809524 x 100 = -90.24%