-26.07% is the change from 863 to 638
Calculation steps:
[( 638 - 863 ) ÷ 863] x 100 = -26.07%
Formula
Percentage change = [(638 - 863) / 863] x 100
Subtract the new number by the original number
638 - 863 = -225
-225 ÷ 863 = -0.2607184241019699
-0.2607184241019699 x 100 = -26.07%