-96.7% is the change from 878 to 29
Calculation steps:
[( 29 - 878 ) ÷ 878] x 100 = -96.7%
Formula
Percentage change = [(29 - 878) / 878] x 100
Subtract the new number by the original number
29 - 878 = -849
-849 ÷ 878 = -0.9669703872437357
-0.9669703872437357 x 100 = -96.7%
Example