71% of Earth's surface is covered in ocean and marginal seas. Marginal seas includes such places as the Mediterranean, Gulf of Mexico, etc. However, that large percentage of surface area being water can appear to be misleading as most estimates place the actual percentage of the Earth's mass from water at around .023%.
Water accounts for about 1/50 th or 2% of the earths mass.
0.023%
The core is 33% of the Earths mass
0.023%
The suns mass is 332,950 earths.
70% or 80% of water covers the earths surface
3.6
The Mantle accounts for about 79% of the earths mass
If by land mass you mean the surface, then 99% is habitable.
Mercury's mass = 0.055 x Earths, Volume = 0.056 x Earths Mars' mass = 0.1075 x Earths, Volume = 0.151 x Earths Venus' mass = 0.815 x Earths, Volume = 0.857 x Earths (Earth) mass = 1 x Earths, Volume = 1 x Earths Uranus' mass = 14.536 x Earths, Volume = 63.086 x Earths Neptune's mass = 17.147 x Earths, Volume = 57.74 x Earths Saturn's mass = 95.152 x Earths, Volume = 763.59 x Earths Jupiter's mass = 317.8 x Earths, Volume = 1321.3 x Earths
about 30%
3% of the earths water, is fresh water