-89.53% is the change from 869 to 91
Calculation steps:
[( 91 - 869 ) ÷ 869] x 100 = -89.53%
Formula
Percentage change = [(91 - 869) / 869] x 100
Subtract the new number by the original number
91 - 869 = -778
-778 ÷ 869 = -0.8952819332566168
-0.8952819332566168 x 100 = -89.53%