-23.82% is the change from 638 to 486
Calculation steps:
[( 486 - 638 ) ÷ 638] x 100 = -23.82%
Formula
Percentage change = [(486 - 638) / 638] x 100
Subtract the new number by the original number
486 - 638 = -152
-152 ÷ 638 = -0.23824451410658307
-0.23824451410658307 x 100 = -23.82%