-99.29% is the change from 990 to 7
Calculation steps:
[( 7 - 990 ) ÷ 990] x 100 = -99.29%
Formula
Percentage change = [(7 - 990) / 990] x 100
Subtract the new number by the original number
7 - 990 = -983
-983 ÷ 990 = -0.9929292929292929
-0.9929292929292929 x 100 = -99.29%