-2.3% is the change from 912 to 891
Calculation steps:
[( 891 - 912 ) ÷ 912] x 100 = -2.3%
Formula
Percentage change = [(891 - 912) / 912] x 100
Subtract the new number by the original number
891 - 912 = -21
-21 ÷ 912 = -0.023026315789473683
-0.023026315789473683 x 100 = -2.3%