-14.93% is the change from 201 to 171
Calculation steps:
[( 171 - 201 ) ÷ 201] x 100 = -14.93%
Formula
Percentage change = [(171 - 201) / 201] x 100
Subtract the new number by the original number
171 - 201 = -30
-30 ÷ 201 = -0.14925373134328357
-0.14925373134328357 x 100 = -14.93%