-89.23% is the change from 845 to 91
Calculation steps:
[( 91 - 845 ) ÷ 845] x 100 = -89.23%
Formula
Percentage change = [(91 - 845) / 845] x 100
Subtract the new number by the original number
91 - 845 = -754
-754 ÷ 845 = -0.8923076923076924
-0.8923076923076924 x 100 = -89.23%