-24.76% is the change from 638 to 480
Calculation steps:
[( 480 - 638 ) ÷ 638] x 100 = -24.76%
Formula
Percentage change = [(480 - 638) / 638] x 100
Subtract the new number by the original number
480 - 638 = -158
-158 ÷ 638 = -0.2476489028213166
-0.2476489028213166 x 100 = -24.76%