-90.77% is the change from 867 to 80
Calculation steps:
[( 80 - 867 ) ÷ 867] x 100 = -90.77%
Formula
Percentage change = [(80 - 867) / 867] x 100
Subtract the new number by the original number
80 - 867 = -787
-787 ÷ 867 = -0.9077277970011534
-0.9077277970011534 x 100 = -90.77%