-9.52% is the change from 189 to 171
Calculation steps:
[( 171 - 189 ) ÷ 189] x 100 = -9.52%
Formula
Percentage change = [(171 - 189) / 189] x 100
Subtract the new number by the original number
171 - 189 = -18
-18 ÷ 189 = -0.09523809523809523
-0.09523809523809523 x 100 = -9.52%