-30.88% is the change from 638 to 441
Calculation steps:
[( 441 - 638 ) ÷ 638] x 100 = -30.88%
Formula
Percentage change = [(441 - 638) / 638] x 100
Subtract the new number by the original number
441 - 638 = -197
-197 ÷ 638 = -0.30877742946708464
-0.30877742946708464 x 100 = -30.88%