-94.51% is the change from 164 to 9
Calculation steps:
[( 9 - 164 ) ÷ 164] x 100 = -94.51%
Formula
Percentage change = [(9 - 164) / 164] x 100
Subtract the new number by the original number
9 - 164 = -155
-155 ÷ 164 = -0.9451219512195121
-0.9451219512195121 x 100 = -94.51%