-40.44% is the change from 638 to 380
Calculation steps:
[( 380 - 638 ) ÷ 638] x 100 = -40.44%
Formula
Percentage change = [(380 - 638) / 638] x 100
Subtract the new number by the original number
380 - 638 = -258
-258 ÷ 638 = -0.4043887147335423
-0.4043887147335423 x 100 = -40.44%