-25.81% is the change from 860 to 638
Calculation steps:
[( 638 - 860 ) ÷ 860] x 100 = -25.81%
Formula
Percentage change = [(638 - 860) / 860] x 100
Subtract the new number by the original number
638 - 860 = -222
-222 ÷ 860 = -0.25813953488372093
-0.25813953488372093 x 100 = -25.81%