82.42% is the change from 91 to 166
Calculation steps:
[( 166 - 91 ) ÷ 91] x 100 = 82.42%
Formula
Percentage change = [(166 - 91) / 91] x 100
Subtract the new number by the original number
166 - 91 = 75
75 ÷ 91 = 0.8241758241758241
0.8241758241758241 x 100 = 82.42%