4.22% is the change from 166 to 173
Calculation steps:
[( 173 - 166 ) ÷ 166] x 100 = 4.22%
Formula
Percentage change = [(173 - 166) / 166] x 100
Subtract the new number by the original number
173 - 166 = 7
7 ÷ 166 = 0.04216867469879518
0.04216867469879518 x 100 = 4.22%