-20.48% is the change from 166 to 132
Calculation steps:
[( 132 - 166 ) ÷ 166] x 100 = -20.48%
Formula
Percentage change = [(132 - 166) / 166] x 100
Subtract the new number by the original number
132 - 166 = -34
-34 ÷ 166 = -0.20481927710843373
-0.20481927710843373 x 100 = -20.48%