-29.62% is the change from 638 to 449
Calculation steps:
[( 449 - 638 ) ÷ 638] x 100 = -29.62%
Formula
Percentage change = [(449 - 638) / 638] x 100
Subtract the new number by the original number
449 - 638 = -189
-189 ÷ 638 = -0.2962382445141066
-0.2962382445141066 x 100 = -29.62%