-16.18% is the change from 204 to 171
Calculation steps:
[( 171 - 204 ) ÷ 204] x 100 = -16.18%
Formula
Percentage change = [(171 - 204) / 204] x 100
Subtract the new number by the original number
171 - 204 = -33
-33 ÷ 204 = -0.16176470588235295
-0.16176470588235295 x 100 = -16.18%