-86.1% is the change from 878 to 122
Calculation steps:
[( 122 - 878 ) ÷ 878] x 100 = -86.1%
Formula
Percentage change = [(122 - 878) / 878] x 100
Subtract the new number by the original number
122 - 878 = -756
-756 ÷ 878 = -0.8610478359908884
-0.8610478359908884 x 100 = -86.1%