-29% is the change from 638 to 453
Calculation steps:
[( 453 - 638 ) ÷ 638] x 100 = -29%
Formula
Percentage change = [(453 - 638) / 638] x 100
Subtract the new number by the original number
453 - 638 = -185
-185 ÷ 638 = -0.28996865203761757
-0.28996865203761757 x 100 = -29%