Dark matter makes up about what percentage of the matter in the universe?

Dark matter makes up about what percentage of the matter in the universe?

• A. 20%
• B. 50%
• C. 80%
• D. 100%

Answer: (C)

Dark matter makes up most of the matter in the universe. Matter is divided into ordinary (baryonic) matter and dark matter. Ordinary matter is only about 5% of the total content, while dark matter is about 27%. If you compare dark matter to the total amount of matter (dark plus ordinary), it’s roughly 27 divided by (27 + 5), which is about 0.84, or around 80–85%. So the best answer is about 80%. The other options would imply different proportions (for example, 20% would mean ordinary matter dominates, 50% would be equal shares, and 100% would mean no dark matter at all), which isn’t supported by observations.

Dark matter makes up most of the matter in the universe. Matter is divided into ordinary (baryonic) matter and dark matter. Ordinary matter is only about 5% of the total content, while dark matter is about 27%. If you compare dark matter to the total amount of matter (dark plus ordinary), it’s roughly 27 divided by (27 + 5), which is about 0.84, or around 80–85%. So the best answer is about 80%. The other options would imply different proportions (for example, 20% would mean ordinary matter dominates, 50% would be equal shares, and 100% would mean no dark matter at all), which isn’t supported by observations.