-11.71% is the change from 777 to 686
Calculation steps:
[( 686 - 777 ) ÷ 777] x 100 = -11.71%
Formula
Percentage change = [(686 - 777) / 777] x 100
Subtract the new number by the original number
686 - 777 = -91
-91 ÷ 777 = -0.11711711711711711
-0.11711711711711711 x 100 = -11.71%