-26.73% is the change from 868 to 636
Calculation steps:
[( 636 - 868 ) ÷ 868] x 100 = -26.73%
Formula
Percentage change = [(636 - 868) / 868] x 100
Subtract the new number by the original number
636 - 868 = -232
-232 ÷ 868 = -0.2672811059907834
-0.2672811059907834 x 100 = -26.73%