800% is the change from 110 to 990
Calculation steps:
[( 990 - 110 ) ÷ 110] x 100 = 800%
Formula
Percentage change = [(990 - 110) / 110] x 100
Subtract the new number by the original number
990 - 110 = 880
880 ÷ 110 = 8
8 x 100 = 800%
Example