-15.72% is the change from 814 to 686
Calculation steps:
[( 686 - 814 ) ÷ 814] x 100 = -15.72%
Formula
Percentage change = [(686 - 814) / 814] x 100
Subtract the new number by the original number
686 - 814 = -128
-128 ÷ 814 = -0.15724815724815724
-0.15724815724815724 x 100 = -15.72%