-81.53% is the change from 861 to 159
Calculation steps:
[( 159 - 861 ) ÷ 861] x 100 = -81.53%
Formula
Percentage change = [(159 - 861) / 861] x 100
Subtract the new number by the original number
159 - 861 = -702
-702 ÷ 861 = -0.8153310104529616
-0.8153310104529616 x 100 = -81.53%