-47.02% is the change from 638 to 338
Calculation steps:
[( 338 - 638 ) ÷ 638] x 100 = -47.02%
Formula
Percentage change = [(338 - 638) / 638] x 100
Subtract the new number by the original number
338 - 638 = -300
-300 ÷ 638 = -0.4702194357366771
-0.4702194357366771 x 100 = -47.02%