-91.57% is the change from 166 to 14
Calculation steps:
[( 14 - 166 ) ÷ 166] x 100 = -91.57%
Formula
Percentage change = [(14 - 166) / 166] x 100
Subtract the new number by the original number
14 - 166 = -152
-152 ÷ 166 = -0.9156626506024096
-0.9156626506024096 x 100 = -91.57%