3.01% is the change from 166 to 171
Calculation steps:
[( 171 - 166 ) ÷ 166] x 100 = 3.01%
Formula
Percentage change = [(171 - 166) / 166] x 100
Subtract the new number by the original number
171 - 166 = 5
5 ÷ 166 = 0.030120481927710843
0.030120481927710843 x 100 = 3.01%