258.24% is the change from 91 to 326
Calculation steps:
[( 326 - 91 ) ÷ 91] x 100 = 258.24%
Formula
Percentage change = [(326 - 91) / 91] x 100
Subtract the new number by the original number
326 - 91 = 235
235 ÷ 91 = 2.5824175824175826
2.5824175824175826 x 100 = 258.24%