-99.53% is the change from 855 to 4
Calculation steps:
[( 4 - 855 ) ÷ 855] x 100 = -99.53%
Formula
Percentage change = [(4 - 855) / 855] x 100
Subtract the new number by the original number
4 - 855 = -851
-851 ÷ 855 = -0.9953216374269006
-0.9953216374269006 x 100 = -99.53%