-48.83% is the change from 643 to 329
Calculation steps:
[( 329 - 643 ) ÷ 643] x 100 = -48.83%
Formula
Percentage change = [(329 - 643) / 643] x 100
Subtract the new number by the original number
329 - 643 = -314
-314 ÷ 643 = -0.48833592534992226
-0.48833592534992226 x 100 = -48.83%