50.83% is the change from 120 to 181
Calculation steps:
[( 181 - 120 ) ÷ 120] x 100 = 50.83%
Formula
Percentage change = [(181 - 120) / 120] x 100
Subtract the new number by the original number
181 - 120 = 61
61 ÷ 120 = 0.5083333333333333
0.5083333333333333 x 100 = 50.83%