-5.52% is the change from 181 to 171
Calculation steps:
[( 171 - 181 ) ÷ 181] x 100 = -5.52%
Formula
Percentage change = [(171 - 181) / 181] x 100
Subtract the new number by the original number
171 - 181 = -10
-10 ÷ 181 = -0.055248618784530384
-0.055248618784530384 x 100 = -5.52%