-88.58% is the change from 797 to 91
Calculation steps:
[( 91 - 797 ) ÷ 797] x 100 = -88.58%
Formula
Percentage change = [(91 - 797) / 797] x 100
Subtract the new number by the original number
91 - 797 = -706
-706 ÷ 797 = -0.8858218318695107
-0.8858218318695107 x 100 = -88.58%