-51.97% is the change from 685 to 329
Calculation steps:
[( 329 - 685 ) ÷ 685] x 100 = -51.97%
Formula
Percentage change = [(329 - 685) / 685] x 100
Subtract the new number by the original number
329 - 685 = -356
-356 ÷ 685 = -0.5197080291970803
-0.5197080291970803 x 100 = -51.97%