-28.37% is the change from 638 to 457
Calculation steps:
[( 457 - 638 ) ÷ 638] x 100 = -28.37%
Formula
Percentage change = [(457 - 638) / 638] x 100
Subtract the new number by the original number
457 - 638 = -181
-181 ÷ 638 = -0.2836990595611285
-0.2836990595611285 x 100 = -28.37%