-26.16% is the change from 864 to 638
Calculation steps:
[( 638 - 864 ) ÷ 864] x 100 = -26.16%
Formula
Percentage change = [(638 - 864) / 864] x 100
Subtract the new number by the original number
638 - 864 = -226
-226 ÷ 864 = -0.26157407407407407
-0.26157407407407407 x 100 = -26.16%