-90.69% is the change from 859 to 80
Calculation steps:
[( 80 - 859 ) ÷ 859] x 100 = -90.69%
Formula
Percentage change = [(80 - 859) / 859] x 100
Subtract the new number by the original number
80 - 859 = -779
-779 ÷ 859 = -0.9068684516880093
-0.9068684516880093 x 100 = -90.69%