9.09% is the change from 165 to 180
Calculation steps:
[( 180 - 165 ) ÷ 165] x 100 = 9.09%
Formula
Percentage change = [(180 - 165) / 165] x 100
Subtract the new number by the original number
180 - 165 = 15
15 ÷ 165 = 0.09090909090909091
0.09090909090909091 x 100 = 9.09%