-27.58% is the change from 881 to 638
Calculation steps:
[( 638 - 881 ) ÷ 881] x 100 = -27.58%
Formula
Percentage change = [(638 - 881) / 881] x 100
Subtract the new number by the original number
638 - 881 = -243
-243 ÷ 881 = -0.2758229284903519
-0.2758229284903519 x 100 = -27.58%