-94.71% is the change from 170 to 9
Calculation steps:
[( 9 - 170 ) ÷ 170] x 100 = -94.71%
Formula
Percentage change = [(9 - 170) / 170] x 100
Subtract the new number by the original number
9 - 170 = -161
-161 ÷ 170 = -0.9470588235294117
-0.9470588235294117 x 100 = -94.71%