-89.67% is the change from 881 to 91
Calculation steps:
[( 91 - 881 ) ÷ 881] x 100 = -89.67%
Formula
Percentage change = [(91 - 881) / 881] x 100
Subtract the new number by the original number
91 - 881 = -790
-790 ÷ 881 = -0.8967082860385925
-0.8967082860385925 x 100 = -89.67%