Final answer:
About 30% of Earth's fresh water is surface water, including water in the Great Lakes.
Step-by-step explanation:
About 30% of Earth's fresh water is surface water, such as the water contained in the Great Lakes. Surface water refers to water that is visible on the Earth's surface, including lakes, rivers, and streams. It is estimated that surface water makes up about 0.3% of all the water on Earth, and around 68.7% of that amount is stored in the form of glaciers and ice caps.
Learn more about Fresh water on Earth's surface