Question

What are the percentages of the large near Earth asteroids that we have found so far?

Answer 1

Larger near-Earth asteroids and comets are less common than smaller objects that could give the planet a close graze, NASA officials said. About 10 percent of the 10,000 discovered NEOs are larger than 3,300 feet (1 km) in size. 

Answer 2

Astronomers has found 90% of large near Earth asteroids that could threaten Earth.