-83.97% is the change from 867 to 139
Calculation steps:
[( 139 - 867 ) ÷ 867] x 100 = -83.97%
Formula
Percentage change = [(139 - 867) / 867] x 100
Subtract the new number by the original number
139 - 867 = -728
-728 ÷ 867 = -0.839677047289504
-0.839677047289504 x 100 = -83.97%