18.63% is the change from 161 to 191
Calculation steps:
[( 191 - 161 ) ÷ 161] x 100 = 18.63%
Formula
Percentage change = [(191 - 161) / 161] x 100
Subtract the new number by the original number
191 - 161 = 30
30 ÷ 161 = 0.18633540372670807
0.18633540372670807 x 100 = 18.63%