-89.45% is the change from 398 to 42
Calculation steps:
[( 42 - 398 ) ÷ 398] x 100 = -89.45%
Formula
Percentage change = [(42 - 398) / 398] x 100
Subtract the new number by the original number
42 - 398 = -356
-356 ÷ 398 = -0.8944723618090452
-0.8944723618090452 x 100 = -89.45%