-89.39% is the change from 990 to 105
Calculation steps:
[( 105 - 990 ) ÷ 990] x 100 = -89.39%
Formula
Percentage change = [(105 - 990) / 990] x 100
Subtract the new number by the original number
105 - 990 = -885
-885 ÷ 990 = -0.8939393939393939
-0.8939393939393939 x 100 = -89.39%