Multiple choice Only ______ of Earth's water is fit for human consumption. 3% 10% 7% 15% Reveal answer Fill a bubble to check yourself A Correct answer Explanation About 97% of Earth's water is saltwater in oceans. Only about 3% is freshwater, and even less of that is readily accessible for human use (most is locked in glaciers or groundwater). This makes 3% the approximately correct figure.