-50.58% is the change from 684 to 338
Calculation steps:
[( 338 - 684 ) ÷ 684] x 100 = -50.58%
Formula
Percentage change = [(338 - 684) / 684] x 100
Subtract the new number by the original number
338 - 684 = -346
-346 ÷ 684 = -0.5058479532163743
-0.5058479532163743 x 100 = -50.58%