-98.8% is the change from 998 to 12
Calculation steps:
[( 12 - 998 ) ÷ 998] x 100 = -98.8%
Formula
Percentage change = [(12 - 998) / 998] x 100
Subtract the new number by the original number
12 - 998 = -986
-986 ÷ 998 = -0.9879759519038076
-0.9879759519038076 x 100 = -98.8%