-48.43% is the change from 638 to 329
Calculation steps:
[( 329 - 638 ) ÷ 638] x 100 = -48.43%
Formula
Percentage change = [(329 - 638) / 638] x 100
Subtract the new number by the original number
329 - 638 = -309
-309 ÷ 638 = -0.4843260188087774
-0.4843260188087774 x 100 = -48.43%