-84.51% is the change from 878 to 136
Calculation steps:
[( 136 - 878 ) ÷ 878] x 100 = -84.51%
Formula
Percentage change = [(136 - 878) / 878] x 100
Subtract the new number by the original number
136 - 878 = -742
-742 ÷ 878 = -0.8451025056947609
-0.8451025056947609 x 100 = -84.51%