11.61% is the change from 155 to 173
Calculation steps:
[( 173 - 155 ) ÷ 155] x 100 = 11.61%
Formula
Percentage change = [(173 - 155) / 155] x 100
Subtract the new number by the original number
173 - 155 = 18
18 ÷ 155 = 0.11612903225806452
0.11612903225806452 x 100 = 11.61%