15.06% is the change from 166 to 191
Calculation steps:
[( 191 - 166 ) ÷ 166] x 100 = 15.06%
Formula
Percentage change = [(191 - 166) / 166] x 100
Subtract the new number by the original number
191 - 166 = 25
25 ÷ 166 = 0.15060240963855423
0.15060240963855423 x 100 = 15.06%