-90.55% is the change from 878 to 83
Calculation steps:
[( 83 - 878 ) ÷ 878] x 100 = -90.55%
Formula
Percentage change = [(83 - 878) / 878] x 100
Subtract the new number by the original number
83 - 878 = -795
-795 ÷ 878 = -0.9054669703872438
-0.9054669703872438 x 100 = -90.55%