-70.47% is the change from 867 to 256
Calculation steps:
[( 256 - 867 ) ÷ 867] x 100 = -70.47%
Formula
Percentage change = [(256 - 867) / 867] x 100
Subtract the new number by the original number
256 - 867 = -611
-611 ÷ 867 = -0.7047289504036909
-0.7047289504036909 x 100 = -70.47%