-90.56% is the change from 879 to 83
Calculation steps:
[( 83 - 879 ) ÷ 879] x 100 = -90.56%
Formula
Percentage change = [(83 - 879) / 879] x 100
Subtract the new number by the original number
83 - 879 = -796
-796 ÷ 879 = -0.9055745164960182
-0.9055745164960182 x 100 = -90.56%