-90.41% is the change from 855 to 82
Calculation steps:
[( 82 - 855 ) ÷ 855] x 100 = -90.41%
Formula
Percentage change = [(82 - 855) / 855] x 100
Subtract the new number by the original number
82 - 855 = -773
-773 ÷ 855 = -0.904093567251462
-0.904093567251462 x 100 = -90.41%