-91.93% is the change from 161 to 13
Calculation steps:
[( 13 - 161 ) ÷ 161] x 100 = -91.93%
Formula
Percentage change = [(13 - 161) / 161] x 100
Subtract the new number by the original number
13 - 161 = -148
-148 ÷ 161 = -0.9192546583850931
-0.9192546583850931 x 100 = -91.93%