Answer:
90% of the stars are in the main sequence of HR diagram.
Explanation:
H-r diagram or the Hertzsprung-Russell diagram shows the evolution of a stars life also known as the stellar evolution.
The four major group of stars on H-R diagram are:
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Located on the uppermost right region of the graph, supergiants are the large, very bright and cool stars.
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Giants are little smaller and dimmer than the Supergiants.
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White Dwarfs are the smaller, dim but very hot stars.
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Main Sequence includes the band of smaller stars.
