-16.83% is the change from 998 to 830
Calculation steps:
[( 830 - 998 ) ÷ 998] x 100 = -16.83%
Formula
Percentage change = [(830 - 998) / 998] x 100
Subtract the new number by the original number
830 - 998 = -168
-168 ÷ 998 = -0.1683366733466934
-0.1683366733466934 x 100 = -16.83%