-89.73% is the change from 409 to 42
Calculation steps:
[( 42 - 409 ) ÷ 409] x 100 = -89.73%
Formula
Percentage change = [(42 - 409) / 409] x 100
Subtract the new number by the original number
42 - 409 = -367
-367 ÷ 409 = -0.8973105134474327
-0.8973105134474327 x 100 = -89.73%