7.74% is the change from 168 to 181
Calculation steps:
[( 181 - 168 ) ÷ 168] x 100 = 7.74%
Formula
Percentage change = [(181 - 168) / 168] x 100
Subtract the new number by the original number
181 - 168 = 13
13 ÷ 168 = 0.07738095238095238
0.07738095238095238 x 100 = 7.74%