Answer: 99%
Explanation: Our sun is at the center of the solar system. It is actually a star, similar to the hundreds of billions of stars located in the Milky Way Galaxy. It is a medium-sized star. Compared with the rest of the objects in our solar system, however, the sun is huge. It has a diameter of 865,000 miles (1,392,000 kilometers)! Its mass is about 2,000,000,000,000,000,000,000 tons! That is 99 percent of the mass of our entire solar system!