-88.42% is the change from 855 to 99
Calculation steps:
[( 99 - 855 ) ÷ 855] x 100 = -88.42%
Formula
Percentage change = [(99 - 855) / 855] x 100
Subtract the new number by the original number
99 - 855 = -756
-756 ÷ 855 = -0.8842105263157894
-0.8842105263157894 x 100 = -88.42%