-21.08% is the change from 868 to 685
Calculation steps:
[( 685 - 868 ) ÷ 868] x 100 = -21.08%
Formula
Percentage change = [(685 - 868) / 868] x 100
Subtract the new number by the original number
685 - 868 = -183
-183 ÷ 868 = -0.2108294930875576
-0.2108294930875576 x 100 = -21.08%