-90.78% is the change from 868 to 80
Calculation steps:
[( 80 - 868 ) ÷ 868] x 100 = -90.78%
Formula
Percentage change = [(80 - 868) / 868] x 100
Subtract the new number by the original number
80 - 868 = -788
-788 ÷ 868 = -0.9078341013824884
-0.9078341013824884 x 100 = -90.78%