-89.39% is the change from 396 to 42
Calculation steps:
[( 42 - 396 ) ÷ 396] x 100 = -89.39%
Formula
Percentage change = [(42 - 396) / 396] x 100
Subtract the new number by the original number
42 - 396 = -354
-354 ÷ 396 = -0.8939393939393939
-0.8939393939393939 x 100 = -89.39%