-90.08% is the change from 867 to 86
Calculation steps:
[( 86 - 867 ) ÷ 867] x 100 = -90.08%
Formula
Percentage change = [(86 - 867) / 867] x 100
Subtract the new number by the original number
86 - 867 = -781
-781 ÷ 867 = -0.9008073817762399
-0.9008073817762399 x 100 = -90.08%