-12.65% is the change from 166 to 145
Calculation steps:
[( 145 - 166 ) ÷ 166] x 100 = -12.65%
Formula
Percentage change = [(145 - 166) / 166] x 100
Subtract the new number by the original number
145 - 166 = -21
-21 ÷ 166 = -0.12650602409638553
-0.12650602409638553 x 100 = -12.65%