-87.78% is the change from 998 to 122
Calculation steps:
[( 122 - 998 ) ÷ 998] x 100 = -87.78%
Formula
Percentage change = [(122 - 998) / 998] x 100
Subtract the new number by the original number
122 - 998 = -876
-876 ÷ 998 = -0.8777555110220441
-0.8777555110220441 x 100 = -87.78%