-14.99% is the change from 807 to 686
Calculation steps:
[( 686 - 807 ) ÷ 807] x 100 = -14.99%
Formula
Percentage change = [(686 - 807) / 807] x 100
Subtract the new number by the original number
686 - 807 = -121
-121 ÷ 807 = -0.14993804213135067
-0.14993804213135067 x 100 = -14.99%