-9.91% is the change from 989 to 891
Calculation steps:
[( 891 - 989 ) ÷ 989] x 100 = -9.91%
Formula
Percentage change = [(891 - 989) / 989] x 100
Subtract the new number by the original number
891 - 989 = -98
-98 ÷ 989 = -0.09908998988877654
-0.09908998988877654 x 100 = -9.91%