-16.41% is the change from 993 to 830
Calculation steps:
[( 830 - 993 ) ÷ 993] x 100 = -16.41%
Formula
Percentage change = [(830 - 993) / 993] x 100
Subtract the new number by the original number
830 - 993 = -163
-163 ÷ 993 = -0.16414904330312186
-0.16414904330312186 x 100 = -16.41%