-26.33% is the change from 638 to 470
Calculation steps:
[( 470 - 638 ) ÷ 638] x 100 = -26.33%
Formula
Percentage change = [(470 - 638) / 638] x 100
Subtract the new number by the original number
470 - 638 = -168
-168 ÷ 638 = -0.26332288401253917
-0.26332288401253917 x 100 = -26.33%