-88.79% is the change from 990 to 111
Calculation steps:
[( 111 - 990 ) ÷ 990] x 100 = -88.79%
Formula
Percentage change = [(111 - 990) / 990] x 100
Subtract the new number by the original number
111 - 990 = -879
-879 ÷ 990 = -0.8878787878787879
-0.8878787878787879 x 100 = -88.79%