-16.73% is the change from 998 to 831
Calculation steps:
[( 831 - 998 ) ÷ 998] x 100 = -16.73%
Formula
Percentage change = [(831 - 998) / 998] x 100
Subtract the new number by the original number
831 - 998 = -167
-167 ÷ 998 = -0.16733466933867736
-0.16733466933867736 x 100 = -16.73%