-95.91% is the change from 171 to 7
Calculation steps:
[( 7 - 171 ) ÷ 171] x 100 = -95.91%
Formula
Percentage change = [(7 - 171) / 171] x 100
Subtract the new number by the original number
7 - 171 = -164
-164 ÷ 171 = -0.9590643274853801
-0.9590643274853801 x 100 = -95.91%