-80.06% is the change from 998 to 199
Calculation steps:
[( 199 - 998 ) ÷ 998] x 100 = -80.06%
Formula
Percentage change = [(199 - 998) / 998] x 100
Subtract the new number by the original number
199 - 998 = -799
-799 ÷ 998 = -0.8006012024048096
-0.8006012024048096 x 100 = -80.06%