[ Answer ]
[tex]\boxed{-0.9}[/tex]
[ Explanation ]
0.1 is x times as much as 1.0
Solve for x using subtraction
0.1 - 1.0
= -0.9
0.1 is -0.9 times as greater as 1.0
[tex]\boxed{[ \ Eclipsed \ ]}[/tex]
