-20.04% is the change from 998 to 798
Calculation steps:
[( 798 - 998 ) ÷ 998] x 100 = -20.04%
Formula
Percentage change = [(798 - 998) / 998] x 100
Subtract the new number by the original number
798 - 998 = -200
-200 ÷ 998 = -0.20040080160320642
-0.20040080160320642 x 100 = -20.04%