-4.68% is the change from 171 to 163
Calculation steps:
[( 163 - 171 ) ÷ 171] x 100 = -4.68%
Formula
Percentage change = [(163 - 171) / 171] x 100
Subtract the new number by the original number
163 - 171 = -8
-8 ÷ 171 = -0.04678362573099415
-0.04678362573099415 x 100 = -4.68%