What percentage of Earth's surface is covered by oceans?

Approximately 71% of the Earth's surface is covered by oceans, making them the largest bodies of water on our planet. The oceans play a crucial role in regulating the Earth's climate, storing carbon dioxide, and supporting a diverse range of marine life.

Of the total water on Earth, about 97% is saltwater, and only 3% is freshwater. Most of the freshwater is not readily accessible because it is locked up in glaciers and polar ice caps. Thus, the vast majority of the Earth's water is found in the oceans. Therefore, the correct answer 71%.