-90.22% is the change from 869 to 85
Calculation steps:
[( 85 - 869 ) ÷ 869] x 100 = -90.22%
Formula
Percentage change = [(85 - 869) / 869] x 100
Subtract the new number by the original number
85 - 869 = -784
-784 ÷ 869 = -0.9021864211737629
-0.9021864211737629 x 100 = -90.22%