-85.31% is the change from 878 to 129
Calculation steps:
[( 129 - 878 ) ÷ 878] x 100 = -85.31%
Formula
Percentage change = [(129 - 878) / 878] x 100
Subtract the new number by the original number
129 - 878 = -749
-749 ÷ 878 = -0.8530751708428246
-0.8530751708428246 x 100 = -85.31%