-90.75% is the change from 865 to 80
Calculation steps:
[( 80 - 865 ) ÷ 865] x 100 = -90.75%
Formula
Percentage change = [(80 - 865) / 865] x 100
Subtract the new number by the original number
80 - 865 = -785
-785 ÷ 865 = -0.9075144508670521
-0.9075144508670521 x 100 = -90.75%