-8.29% is the change from 181 to 166
Calculation steps:
[( 166 - 181 ) ÷ 181] x 100 = -8.29%
Formula
Percentage change = [(166 - 181) / 181] x 100
Subtract the new number by the original number
166 - 181 = -15
-15 ÷ 181 = -0.08287292817679558
-0.08287292817679558 x 100 = -8.29%