-7.23% is the change from 166 to 154
Calculation steps:
[( 154 - 166 ) ÷ 166] x 100 = -7.23%
Formula
Percentage change = [(154 - 166) / 166] x 100
Subtract the new number by the original number
154 - 166 = -12
-12 ÷ 166 = -0.07228915662650602
-0.07228915662650602 x 100 = -7.23%