-25.55% is the change from 638 to 475
Calculation steps:
[( 475 - 638 ) ÷ 638] x 100 = -25.55%
Formula
Percentage change = [(475 - 638) / 638] x 100
Subtract the new number by the original number
475 - 638 = -163
-163 ÷ 638 = -0.2554858934169279
-0.2554858934169279 x 100 = -25.55%