-2.2% is the change from 911 to 891
Calculation steps:
[( 891 - 911 ) ÷ 911] x 100 = -2.2%
Formula
Percentage change = [(891 - 911) / 911] x 100
Subtract the new number by the original number
891 - 911 = -20
-20 ÷ 911 = -0.021953896816684963
-0.021953896816684963 x 100 = -2.2%