-52.04% is the change from 686 to 329
Calculation steps:
[( 329 - 686 ) ÷ 686] x 100 = -52.04%
Formula
Percentage change = [(329 - 686) / 686] x 100
Subtract the new number by the original number
329 - 686 = -357
-357 ÷ 686 = -0.5204081632653061
-0.5204081632653061 x 100 = -52.04%