-98.83% is the change from 171 to 2
Calculation steps:
[( 2 - 171 ) ÷ 171] x 100 = -98.83%
Formula
Percentage change = [(2 - 171) / 171] x 100
Subtract the new number by the original number
2 - 171 = -169
-169 ÷ 171 = -0.9883040935672515
-0.9883040935672515 x 100 = -98.83%