80.22% is the change from 91 to 164
Calculation steps:
[( 164 - 91 ) ÷ 91] x 100 = 80.22%
Formula
Percentage change = [(164 - 91) / 91] x 100
Subtract the new number by the original number
164 - 91 = 73
73 ÷ 91 = 0.8021978021978022
0.8021978021978022 x 100 = 80.22%