-2.81% is the change from 891 to 866
Calculation steps:
[( 866 - 891 ) ÷ 891] x 100 = -2.81%
Formula
Percentage change = [(866 - 891) / 891] x 100
Subtract the new number by the original number
866 - 891 = -25
-25 ÷ 891 = -0.028058361391694726
-0.028058361391694726 x 100 = -2.81%