-17.98% is the change from 990 to 812
Calculation steps:
[( 812 - 990 ) ÷ 990] x 100 = -17.98%
Formula
Percentage change = [(812 - 990) / 990] x 100
Subtract the new number by the original number
812 - 990 = -178
-178 ÷ 990 = -0.1797979797979798
-0.1797979797979798 x 100 = -17.98%