-62.54% is the change from 638 to 239
Calculation steps:
[( 239 - 638 ) ÷ 638] x 100 = -62.54%
Formula
Percentage change = [(239 - 638) / 638] x 100
Subtract the new number by the original number
239 - 638 = -399
-399 ÷ 638 = -0.6253918495297806
-0.6253918495297806 x 100 = -62.54%