What fraction of the Coma Cluster's total mass is modern estimates believed to be dark matter?

Answer

About 90%

Modern estimates suggest that approximately 90% of the total mass budget within the Coma Cluster is composed of dark matter.

What fraction of the Coma Cluster's total mass is modern estimates believed to be dark matter?
Spaceastronomygalaxy clusterComa ClusterCoordinatesGalactic Coordinates