-94.3% is the change from 158 to 9
Calculation steps:
[( 9 - 158 ) ÷ 158] x 100 = -94.3%
Formula
Percentage change = [(9 - 158) / 158] x 100
Subtract the new number by the original number
9 - 158 = -149
-149 ÷ 158 = -0.9430379746835443
-0.9430379746835443 x 100 = -94.3%