-94.8% is the change from 173 to 9
Calculation steps:
[( 9 - 173 ) ÷ 173] x 100 = -94.8%
Formula
Percentage change = [(9 - 173) / 173] x 100
Subtract the new number by the original number
9 - 173 = -164
-164 ÷ 173 = -0.9479768786127167
-0.9479768786127167 x 100 = -94.8%