[ Answer ]
[tex]\boxed{\frac{240}{560} }[/tex]
[ Explanation ]
Current Fraction: [tex]\frac{320}{560}[/tex]
[tex]\frac{320}{560}[/tex] + [tex]\frac{X}{560}[/tex] = [tex]\frac{560}{560}[/tex]
Use Subtraction To Solve For X:
560 - 320 = 240
X = 240
Check Your Work:
[tex]\frac{320}{560}[/tex] + [tex]\frac{240}{560}[/tex] = [tex]\frac{560}{560}[/tex]
[tex]\frac{560}{560}[/tex] = 1 Whole
[tex]\boxed{[ \ Eclipsed \ ]}[/tex]