-12.83% is the change from 990 to 863
Calculation steps:
[( 863 - 990 ) ÷ 990] x 100 = -12.83%
Formula
Percentage change = [(863 - 990) / 990] x 100
Subtract the new number by the original number
863 - 990 = -127
-127 ÷ 990 = -0.12828282828282828
-0.12828282828282828 x 100 = -12.83%