-54.81% is the change from 686 to 310
Calculation steps:
[( 310 - 686 ) ÷ 686] x 100 = -54.81%
Formula
Percentage change = [(310 - 686) / 686] x 100
Subtract the new number by the original number
310 - 686 = -376
-376 ÷ 686 = -0.5481049562682215
-0.5481049562682215 x 100 = -54.81%