Percentage wise - all of them.
There are a number that have progressed off of the main sequence:-
White dwarfs have very small surface areas compared to main sequence stars and therefore cannot emit as much light.
The main star of Virgo is Spica, is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth. The main star of Virgo is Spica, is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth. The main star of Virgo is Spica, is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth. The main star of Virgo is Spica, is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth.
The temperature of main sequence stars can vary quite a bit.
The HR diagram does not reference stars on their way to the main sequence, only during or after.
main sequence
The most massive main sequence stars are the brightest, (O main sequence star on Hertzsprung-Russel Diagram). Main sequence stars obey a mass-luminosity relation. On the H-R diagram the vertical axis is the brightness. So the stars along the top are the brightest (intrinsically).
Red giant is the largest and the brightest.
Percentage wise - all of them.There are a number that have progressed off of the main sequence:-Betelgeuse. CNO cycle.Rigel: Shell burning.
Most stars in the universe today are main sequence stars. Sirius A is the brightest star in the nighttime sky. The sun is the most massive main sequence star in the universe today.
Altair is the brightest star in the constellation Aquila and twelfth brightest star in the night sky . It is an A- type main sequence star
Red giants, red supergiants and red hypergiants.
White dwarfs have very small surface areas compared to main sequence stars and therefore cannot emit as much light.
Early population stars. Because of the extreme temperature of the burning hydrogen at 3000 kelvin they are the brightest stars and can appear in a bluish tint. "Smurf" is another answer.
Main Sequence
Several regions of the HR diagram have been given names, although stars can occupy any portion. The brightest stars are called supergiants. Star clusters are rich in stars just off the main sequence called red giants. Main sequence stars are called dwarfs.
The main star of Virgo is Spica, is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth. The main star of Virgo is Spica, is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth. The main star of Virgo is Spica, is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth. The main star of Virgo is Spica, is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth.
The sun is a main sequence star