-26.64% is the change from 867 to 636
Calculation steps:
[( 636 - 867 ) ÷ 867] x 100 = -26.64%
Formula
Percentage change = [(636 - 867) / 867] x 100
Subtract the new number by the original number
636 - 867 = -231
-231 ÷ 867 = -0.2664359861591695
-0.2664359861591695 x 100 = -26.64%