791.21% is the change from 91 to 811
Calculation steps:
[( 811 - 91 ) ÷ 91] x 100 = 791.21%
Formula
Percentage change = [(811 - 91) / 91] x 100
Subtract the new number by the original number
811 - 91 = 720
720 ÷ 91 = 7.912087912087912
7.912087912087912 x 100 = 791.21%