-40.13% is the change from 638 to 382
Calculation steps:
[( 382 - 638 ) ÷ 638] x 100 = -40.13%
Formula
Percentage change = [(382 - 638) / 638] x 100
Subtract the new number by the original number
382 - 638 = -256
-256 ÷ 638 = -0.4012539184952978
-0.4012539184952978 x 100 = -40.13%