-30.83% is the change from 999 to 691
Calculation steps:
[( 691 - 999 ) ÷ 999] x 100 = -30.83%
Formula
Percentage change = [(691 - 999) / 999] x 100
Subtract the new number by the original number
691 - 999 = -308
-308 ÷ 999 = -0.3083083083083083
-0.3083083083083083 x 100 = -30.83%