-85.68% is the change from 866 to 124
Calculation steps:
[( 124 - 866 ) ÷ 866] x 100 = -85.68%
Formula
Percentage change = [(124 - 866) / 866] x 100
Subtract the new number by the original number
124 - 866 = -742
-742 ÷ 866 = -0.8568129330254042
-0.8568129330254042 x 100 = -85.68%