-20.65% is the change from 867 to 688
Calculation steps:
[( 688 - 867 ) ÷ 867] x 100 = -20.65%
Formula
Percentage change = [(688 - 867) / 867] x 100
Subtract the new number by the original number
688 - 867 = -179
-179 ÷ 867 = -0.20645905420991925
-0.20645905420991925 x 100 = -20.65%