What fraction of the mass needed to halt expansion of the universe exists in the form of visible, luminous matter (such as the stars within galaxies)?

Question

Quizplus · Accepted Answer

According to scientific research, the fraction of the mass needed to halt the expansion of the universe is estimated to be around 27%, of which only a small fraction (less than 1%) exists in the form of visible, luminous matter such as stars and galaxies. The remaining mass is made up of dark matter and dark energy, which have yet to be fully understood.

What Fraction of the Mass Needed to Halt Expansion of the Universe