-6.02% is the change from 166 to 156
Calculation steps:
[( 156 - 166 ) ÷ 166] x 100 = -6.02%
Formula
Percentage change = [(156 - 166) / 166] x 100
Subtract the new number by the original number
156 - 166 = -10
-10 ÷ 166 = -0.060240963855421686
-0.060240963855421686 x 100 = -6.02%