-90.2% is the change from 867 to 85
Calculation steps:
[( 85 - 867 ) ÷ 867] x 100 = -90.2%
Formula
Percentage change = [(85 - 867) / 867] x 100
Subtract the new number by the original number
85 - 867 = -782
-782 ÷ 867 = -0.9019607843137255
-0.9019607843137255 x 100 = -90.2%