-3.29% is the change from 911 to 881
Calculation steps:
[( 881 - 911 ) ÷ 911] x 100 = -3.29%
Formula
Percentage change = [(881 - 911) / 911] x 100
Subtract the new number by the original number
881 - 911 = -30
-30 ÷ 911 = -0.03293084522502744
-0.03293084522502744 x 100 = -3.29%