They on average pass approximately 70% on, but the record labels also eat heavily into that before the artists get their share.
I'm reminded of an effort a few years ago to legislate the creators getting 50% - which of course meant the "platforms" and the "labels" would collectively share only the other 50%. Which is presumably why the initiative failed.
> The three major labels - Sony, Universal and Warner Music - faced some of the toughest questioning of the inquiry, and were accused of a "lack of clarity" by MPs.
> They largely argued to maintain the status quo, saying any disruption could damage investment in new music, and resisted the idea that streaming was comparable to radio - where artists receive a 50/50 royalty split.
> "It is a narrow-margin business, so it wouldn't actually take that much to upset the so-called apple cart," said Apple Music's Elena Segal.
https://www.bbc.com/news/entertainment-arts-57838473
These days Spotify has hundreds of millions for Joe Rogan and podcast investments, and Apple reports a 75% profit margin on services, so I guess it is quite profitable for everyone except the actual artists.