-82.87% is the change from 998 to 171
Calculation steps:
[( 171 - 998 ) ÷ 998] x 100 = -82.87%
Formula
Percentage change = [(171 - 998) / 998] x 100
Subtract the new number by the original number
171 - 998 = -827
-827 ÷ 998 = -0.8286573146292585
-0.8286573146292585 x 100 = -82.87%