-25.24% is the change from 638 to 477
Calculation steps:
[( 477 - 638 ) ÷ 638] x 100 = -25.24%
Formula
Percentage change = [(477 - 638) / 638] x 100
Subtract the new number by the original number
477 - 638 = -161
-161 ÷ 638 = -0.25235109717868337
-0.25235109717868337 x 100 = -25.24%