121.33% is the change from 75 to 166
Calculation steps:
[( 166 - 75 ) ÷ 75] x 100 = 121.33%
Formula
Percentage change = [(166 - 75) / 75] x 100
Subtract the new number by the original number
166 - 75 = 91
91 ÷ 75 = 1.2133333333333334
1.2133333333333334 x 100 = 121.33%