-25.95% is the change from 867 to 642
Calculation steps:
[( 642 - 867 ) ÷ 867] x 100 = -25.95%
Formula
Percentage change = [(642 - 867) / 867] x 100
Subtract the new number by the original number
642 - 867 = -225
-225 ÷ 867 = -0.25951557093425603
-0.25951557093425603 x 100 = -25.95%