Q. What is percentage of expansion (coverage) of continents on the Earth"s surface?
Answer: 29–30%
Notes: About 70-71 percent of the Earth’s surface is water- covered, and the oceans hold about 96.5 percent of all Earth’s water. this means that the continents (landmasses) occupy about 29-30% of the Earth’s surface. Asia, the biggest continent, occupies nearly 29.1 percent of Earth’s total land mass.