-90.16% is the change from 864 to 85
Calculation steps:
[( 85 - 864 ) ÷ 864] x 100 = -90.16%
Formula
Percentage change = [(85 - 864) / 864] x 100
Subtract the new number by the original number
85 - 864 = -779
-779 ÷ 864 = -0.9016203703703703
-0.9016203703703703 x 100 = -90.16%