10.9% is the change from 156 to 173
Calculation steps:
[( 173 - 156 ) ÷ 156] x 100 = 10.9%
Formula
Percentage change = [(173 - 156) / 156] x 100
Subtract the new number by the original number
173 - 156 = 17
17 ÷ 156 = 0.10897435897435898
0.10897435897435898 x 100 = 10.9%