-38.09% is the change from 638 to 395
Calculation steps:
[( 395 - 638 ) ÷ 638] x 100 = -38.09%
Formula
Percentage change = [(395 - 638) / 638] x 100
Subtract the new number by the original number
395 - 638 = -243
-243 ÷ 638 = -0.38087774294670845
-0.38087774294670845 x 100 = -38.09%