-10.68% is the change from 768 to 686
Calculation steps:
[( 686 - 768 ) ÷ 768] x 100 = -10.68%
Formula
Percentage change = [(686 - 768) / 768] x 100
Subtract the new number by the original number
686 - 768 = -82
-82 ÷ 768 = -0.10677083333333333
-0.10677083333333333 x 100 = -10.68%