-90.26% is the change from 873 to 85
Calculation steps:
[( 85 - 873 ) ÷ 873] x 100 = -90.26%
Formula
Percentage change = [(85 - 873) / 873] x 100
Subtract the new number by the original number
85 - 873 = -788
-788 ÷ 873 = -0.9026345933562429
-0.9026345933562429 x 100 = -90.26%