-11.45% is the change from 166 to 147
Calculation steps:
[( 147 - 166 ) ÷ 166] x 100 = -11.45%
Formula
Percentage change = [(147 - 166) / 166] x 100
Subtract the new number by the original number
147 - 166 = -19
-19 ÷ 166 = -0.1144578313253012
-0.1144578313253012 x 100 = -11.45%