-27.59% is the change from 638 to 462
Calculation steps:
[( 462 - 638 ) ÷ 638] x 100 = -27.59%
Formula
Percentage change = [(462 - 638) / 638] x 100
Subtract the new number by the original number
462 - 638 = -176
-176 ÷ 638 = -0.27586206896551724
-0.27586206896551724 x 100 = -27.59%