-90.84% is the change from 873 to 80
Calculation steps:
[( 80 - 873 ) ÷ 873] x 100 = -90.84%
Formula
Percentage change = [(80 - 873) / 873] x 100
Subtract the new number by the original number
80 - 873 = -793
-793 ÷ 873 = -0.9083619702176403
-0.9083619702176403 x 100 = -90.84%