-97.08% is the change from 171 to 5
Calculation steps:
[( 5 - 171 ) ÷ 171] x 100 = -97.08%
Formula
Percentage change = [(5 - 171) / 171] x 100
Subtract the new number by the original number
5 - 171 = -166
-166 ÷ 171 = -0.9707602339181286
-0.9707602339181286 x 100 = -97.08%