-73.69% is the change from 878 to 231
Calculation steps:
[( 231 - 878 ) ÷ 878] x 100 = -73.69%
Formula
Percentage change = [(231 - 878) / 878] x 100
Subtract the new number by the original number
231 - 878 = -647
-647 ÷ 878 = -0.7369020501138952
-0.7369020501138952 x 100 = -73.69%