-90.3% is the change from 990 to 96
Calculation steps:
[( 96 - 990 ) ÷ 990] x 100 = -90.3%
Formula
Percentage change = [(96 - 990) / 990] x 100
Subtract the new number by the original number
96 - 990 = -894
-894 ÷ 990 = -0.9030303030303031
-0.9030303030303031 x 100 = -90.3%