-15.41% is the change from 811 to 686
Calculation steps:
[( 686 - 811 ) ÷ 811] x 100 = -15.41%
Formula
Percentage change = [(686 - 811) / 811] x 100
Subtract the new number by the original number
686 - 811 = -125
-125 ÷ 811 = -0.15413070283600494
-0.15413070283600494 x 100 = -15.41%