30.83% is the change from 120 to 157
Calculation steps:
[( 157 - 120 ) ÷ 120] x 100 = 30.83%
Formula
Percentage change = [(157 - 120) / 120] x 100
Subtract the new number by the original number
157 - 120 = 37
37 ÷ 120 = 0.30833333333333335
0.30833333333333335 x 100 = 30.83%