-26.61% is the change from 868 to 637
Calculation steps:
[( 637 - 868 ) ÷ 868] x 100 = -26.61%
Formula
Percentage change = [(637 - 868) / 868] x 100
Subtract the new number by the original number
637 - 868 = -231
-231 ÷ 868 = -0.2661290322580645
-0.2661290322580645 x 100 = -26.61%