[ Answer ]
[tex]\boxed{\bold{\frac{5}{8} }}[/tex]
[ Explanation ]
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1 - [tex]\frac{3}{8}[/tex] = [tex]\frac{5}{8}[/tex]
[tex]\frac{1}{1}[/tex] - [tex]\frac{3}{8}[/tex]
[tex]\frac{(1*8)-(3*1)}{1*8}[/tex]
[tex]\frac{8-3}{8}[/tex]
[tex]\frac{5}{8}[/tex]
[tex]\boxed{\bold{[] \ Eclipsed \ []}}[/tex]