-89.87% is the change from 879 to 89
Calculation steps:
[( 89 - 879 ) ÷ 879] x 100 = -89.87%
Formula
Percentage change = [(89 - 879) / 879] x 100
Subtract the new number by the original number
89 - 879 = -790
-790 ÷ 879 = -0.8987485779294653
-0.8987485779294653 x 100 = -89.87%