-7.18% is the change from 181 to 168
Calculation steps:
[( 168 - 181 ) ÷ 181] x 100 = -7.18%
Formula
Percentage change = [(168 - 181) / 181] x 100
Subtract the new number by the original number
168 - 181 = -13
-13 ÷ 181 = -0.0718232044198895
-0.0718232044198895 x 100 = -7.18%