-88.64% is the change from 801 to 91
Calculation steps:
[( 91 - 801 ) ÷ 801] x 100 = -88.64%
Formula
Percentage change = [(91 - 801) / 801] x 100
Subtract the new number by the original number
91 - 801 = -710
-710 ÷ 801 = -0.8863920099875156
-0.8863920099875156 x 100 = -88.64%