-1.2% is the change from 166 to 164
Calculation steps:
[( 164 - 166 ) ÷ 166] x 100 = -1.2%
Formula
Percentage change = [(164 - 166) / 166] x 100
Subtract the new number by the original number
164 - 166 = -2
-2 ÷ 166 = -0.012048192771084338
-0.012048192771084338 x 100 = -1.2%