-20.88% is the change from 867 to 686
Calculation steps:
[( 686 - 867 ) ÷ 867] x 100 = -20.88%
Formula
Percentage change = [(686 - 867) / 867] x 100
Subtract the new number by the original number
686 - 867 = -181
-181 ÷ 867 = -0.20876585928489041
-0.20876585928489041 x 100 = -20.88%