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Missing dark matter

From wikipedia:
Dark matter is a hypothetical form of matter that is thought to account for approximately 85% of the matter in the universe.

Surrounding and stretching between galaxies, there is a rarefied plasma that is organized in a galactic filamentary structure. This material is called the intergalactic medium (IGM). The density of the IGM is 5–200 times the average density of the Universe. It consists mostly of ionized hydrogen; i.e. a plasma consisting of equal numbers of electrons and protons.  At these temperatures, it is called the warm–hot intergalactic medium (WHIM). (Although the plasma is very hot by terrestrial standards, 105 K is often called "warm" in astrophysics.) Computer simulations and observations indicate that up to half of the atomic matter in the Universe might exist in this warm–hot, rarefied state.

Cosmologists know half of the matter in the universe is in the intergalactic medium. It is not like a dense solid but it is in a huge volume.

Cosmologists claim 85% of the matter in the universe is dark or invisible.

Does the dark matter estimate of 85% ignore this 50% so it is really only 35%? Or is the 85% in addition to this 50%?

This combination is confusing with so much hidden.
The large percentage for dark matter does not have a clear justification for that number, none I can find online, so I don't know if it  addressed the WHIM.

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