-22.29% is the change from 166 to 129
Calculation steps:
[( 129 - 166 ) ÷ 166] x 100 = -22.29%
Formula
Percentage change = [(129 - 166) / 166] x 100
Subtract the new number by the original number
129 - 166 = -37
-37 ÷ 166 = -0.22289156626506024
-0.22289156626506024 x 100 = -22.29%