-90.22% is the change from 879 to 86
Calculation steps:
[( 86 - 879 ) ÷ 879] x 100 = -90.22%
Formula
Percentage change = [(86 - 879) / 879] x 100
Subtract the new number by the original number
86 - 879 = -793
-793 ÷ 879 = -0.9021615472127418
-0.9021615472127418 x 100 = -90.22%