The Universe: 2.5 - 31.5 percent "normal" matter

"However, our observations of normal matter (protons, neutrons and electrons) only account for about 2.5 percent of the universe—the rest of it is nowhere to be found. This mismatch is known as the "missing baryon problem.""
https://www.newsweek.com/mystery-universe-missing-matter-solved-681514

"But it is an important mystery. It turns out that roughly 68% of the universe is dark energy. Dark matter makes up about 27%. The rest - everything on Earth, everything ever observed with all of our instruments, all normal matter - adds up to less than 5% of the universe. Come to think of it, maybe it shouldn't be called "normal" matter at all, since it is such a small fraction of the universe."
https://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy

"That number is in rough agreement with previous estimates, which astronomers have calculated via a variety of methods. For example, the team behind Europe's Planck satellite, which scrutinized the cosmic microwave background — the glow left over from the Big Bang — determined in 2013 that dark energy makes up 68.3% of the universe.

The new study also reaffirms the piddling 5% contribution of "normal" matter, the stuff that makes up stars, planets, trees, oceans and everything else that we can directly see and touch.

Abdullah and his colleagues arrived at their number by studying galaxy clusters."
https://www.space.com/universe-total-amount-matter-measured

"the Universe is mostly dark: about 96 percent consists of dark energy (about 69%) and dark matter (about 26%). Only about 5 % (the same proportion as the lighter colored jelly beans) of the Universe— including the stars, planets and us—is made of familiar atomic matter"
https://chandra.harvard.edu/darkuniverse/

"The scientists arrived at 31.5 percent matter, with the rest being made up by a variety of spooky ingredients at a distance."
https://www.popularmechanics.com/space/deep-space/a34272429/how-much-matter-is-in-the-universe/