-62.7% is the change from 638 to 238
Calculation steps:
[( 238 - 638 ) ÷ 638] x 100 = -62.7%
Formula
Percentage change = [(238 - 638) / 638] x 100
Subtract the new number by the original number
238 - 638 = -400
-400 ÷ 638 = -0.6269592476489029
-0.6269592476489029 x 100 = -62.7%