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Specific gravity of an object is the ratio of density of sample to density of  reference substance.
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\"\"
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Specific gravity of an object is \"\".
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Specific gravity of an seawater is \"\".
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Let the mass of the object as \"\" and volume of the object as \"\".
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\"\".
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\"\"
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Gravitational force on the object is \"\"
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\"\"
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Let  volume of seawater submerged as \"\".
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By Archimedes Principle, the buoyance force \"\".
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\"\".
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At the equilibrium, \"\".
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Therefore,
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\"\"
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Immersed portion of the volume into the water is \"\".
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Hence, the percentage of object under the sea water is \"\".
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Therefore, the percentage of object above the sea water is \"\".
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Percentage of object above the sea water is \"\".
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