-16.37% is the change from 171 to 143
Calculation steps:
[( 143 - 171 ) ÷ 171] x 100 = -16.37%
Formula
Percentage change = [(143 - 171) / 171] x 100
Subtract the new number by the original number
143 - 171 = -28
-28 ÷ 171 = -0.16374269005847952
-0.16374269005847952 x 100 = -16.37%