15.83% is the change from 120 to 139
Calculation steps:
[( 139 - 120 ) ÷ 120] x 100 = 15.83%
Formula
Percentage change = [(139 - 120) / 120] x 100
Subtract the new number by the original number
139 - 120 = 19
19 ÷ 120 = 0.15833333333333333
0.15833333333333333 x 100 = 15.83%