-83.83% is the change from 866 to 140
Calculation steps:
[( 140 - 866 ) ÷ 866] x 100 = -83.83%
Formula
Percentage change = [(140 - 866) / 866] x 100
Subtract the new number by the original number
140 - 866 = -726
-726 ÷ 866 = -0.8383371824480369
-0.8383371824480369 x 100 = -83.83%