-51.62% is the change from 680 to 329
Calculation steps:
[( 329 - 680 ) ÷ 680] x 100 = -51.62%
Formula
Percentage change = [(329 - 680) / 680] x 100
Subtract the new number by the original number
329 - 680 = -351
-351 ÷ 680 = -0.5161764705882353
-0.5161764705882353 x 100 = -51.62%