The total volume of water on Earth is estimated at 1.386 billion km3 (333 million cubic miles), with 97.5 % being salt water and 2.5 % being fresh water. Of the fresh water, only 0.3 % is in liquid form on the surface. In addition, the lower mantle of inner earth may hold as much as 5 times more water than all surface water combined (all oceans, all lakes, all rivers).
of the total water on earth what percent is freshwater
2.5 %