-27.12% is the change from 638 to 465
Calculation steps:
[( 465 - 638 ) ÷ 638] x 100 = -27.12%
Formula
Percentage change = [(465 - 638) / 638] x 100
Subtract the new number by the original number
465 - 638 = -173
-173 ÷ 638 = -0.2711598746081505
-0.2711598746081505 x 100 = -27.12%