-15.66% is the change from 166 to 140
Calculation steps:
[( 140 - 166 ) ÷ 166] x 100 = -15.66%
Formula
Percentage change = [(140 - 166) / 166] x 100
Subtract the new number by the original number
140 - 166 = -26
-26 ÷ 166 = -0.1566265060240964
-0.1566265060240964 x 100 = -15.66%