-88.88% is the change from 818 to 91
Calculation steps:
[( 91 - 818 ) ÷ 818] x 100 = -88.88%
Formula
Percentage change = [(91 - 818) / 818] x 100
Subtract the new number by the original number
91 - 818 = -727
-727 ÷ 818 = -0.8887530562347188
-0.8887530562347188 x 100 = -88.88%