49.59% is the change from 121 to 181
Calculation steps:
[( 181 - 121 ) ÷ 121] x 100 = 49.59%
Formula
Percentage change = [(181 - 121) / 121] x 100
Subtract the new number by the original number
181 - 121 = 60
60 ÷ 121 = 0.49586776859504134
0.49586776859504134 x 100 = 49.59%