835.16% is the change from 91 to 851
Calculation steps:
[( 851 - 91 ) ÷ 91] x 100 = 835.16%
Formula
Percentage change = [(851 - 91) / 91] x 100
Subtract the new number by the original number
851 - 91 = 760
760 ÷ 91 = 8.351648351648352
8.351648351648352 x 100 = 835.16%