37.19% is the change from 121 to 166
Calculation steps:
[( 166 - 121 ) ÷ 121] x 100 = 37.19%
Formula
Percentage change = [(166 - 121) / 121] x 100
Subtract the new number by the original number
166 - 121 = 45
45 ÷ 121 = 0.371900826446281
0.371900826446281 x 100 = 37.19%