12.23% is the change from 139 to 156
Calculation steps:
[( 156 - 139 ) ÷ 139] x 100 = 12.23%
Formula
Percentage change = [(156 - 139) / 139] x 100
Subtract the new number by the original number
156 - 139 = 17
17 ÷ 139 = 0.1223021582733813
0.1223021582733813 x 100 = 12.23%