-51.9% is the change from 684 to 329
Calculation steps:
[( 329 - 684 ) ÷ 684] x 100 = -51.9%
Formula
Percentage change = [(329 - 684) / 684] x 100
Subtract the new number by the original number
329 - 684 = -355
-355 ÷ 684 = -0.5190058479532164
-0.5190058479532164 x 100 = -51.9%