-3.08% is the change from 909 to 881
Calculation steps:
[( 881 - 909 ) ÷ 909] x 100 = -3.08%
Formula
Percentage change = [(881 - 909) / 909] x 100
Subtract the new number by the original number
881 - 909 = -28
-28 ÷ 909 = -0.030803080308030802
-0.030803080308030802 x 100 = -3.08%