14.88% is the change from 121 to 139
Calculation steps:
[( 139 - 121 ) ÷ 121] x 100 = 14.88%
Formula
Percentage change = [(139 - 121) / 121] x 100
Subtract the new number by the original number
139 - 121 = 18
18 ÷ 121 = 0.1487603305785124
0.1487603305785124 x 100 = 14.88%