-73.36% is the change from 867 to 231
Calculation steps:
[( 231 - 867 ) ÷ 867] x 100 = -73.36%
Formula
Percentage change = [(231 - 867) / 867] x 100
Subtract the new number by the original number
231 - 867 = -636
-636 ÷ 867 = -0.7335640138408305
-0.7335640138408305 x 100 = -73.36%