-89.66% is the change from 406 to 42
Calculation steps:
[( 42 - 406 ) ÷ 406] x 100 = -89.66%
Formula
Percentage change = [(42 - 406) / 406] x 100
Subtract the new number by the original number
42 - 406 = -364
-364 ÷ 406 = -0.896551724137931
-0.896551724137931 x 100 = -89.66%