-88.89% is the change from 990 to 110
Calculation steps:
[( 110 - 990 ) ÷ 990] x 100 = -88.89%
Formula
Percentage change = [(110 - 990) / 990] x 100
Subtract the new number by the original number
110 - 990 = -880
-880 ÷ 990 = -0.8888888888888888
-0.8888888888888888 x 100 = -88.89%