How much of planet Earth is made of water? Very little, actually. Although oceans of water cover about 70 percent of Earth's surface, these oceans are shallow compared to the Earth's radius. The above illustration shows what would happen if all of the water on or near the surface of the Earth were bunched up into a ball. The radius of this ball would be only about 700 kilometers, less than half the radius of the Earth's Moon, but slightly larger than Saturn's moon Rhea which, like many moons in our outer Solar System, is mostly water ice. How even this much water came to be on the Earth and whether any significant amount is trapped far beneath Earth's surface remain topics of research.
Even more alarming is over 96 percent of that figure is ocean and saline water found in the ground and lakes.
And most of the 3. (something) percent is glaciers, ice caps and surface snow and ice
The amount of fresh water in the world in comparison to the earth's mass in the photo you gave would hardly be seen I reckon.
.. I read up on the subject and here is the nitty gritty of it.
Agreed Garry,
My immediate thought was that fixing a tap would be easier. And why is it that the US favours [favors?] nite over night, yet adds an extra four letters to a three letter word?
While we're on this language thing, what do our Free World residents make of the pop-up adverts for "Lisa Ho"??
Gotta keep my American accent in check. 
