Steam takes 30% and the publisher ( https://rawfury.com/developer-resources/ ) takes 50%, so the dev should end up with 35% of revenue (which then needs to be taxed etc.).
1 - Before Steam take it's cut there are taxes and refunds, 15-20% depend on geography of sales.
2 - Publisher need to recouperate spendings agreed in contract, but yeah then it's likely between 40 and 60%.
For 2., I linked the page where you can find the document where the publisher claims to take 50%, if I didn’t miss something while skimming it.
Refunds on Steam can happen after a while so it's important to keep them in mind. If you sold 100 copies of your game 5-10% will be refunded.
> I linked the page where you can find the document where the publisher claims to take 50%.
I havent worked with Raw Fury and wouldn't be able to talk about it then anyway, but:
1 - If a publisher funded your game they will recuperate expenses by taking 70-100% of net profit. After that it can be 50%
2 - Some publishers also include localization, QA, LQA and even marketing budget into recoup amount.
Steam is just the storefront. A game publisher's role varies a lot - sometimes they're just financing the project, usually they handle stuff like PR and marketing, and sometimes they help quite a bit more with the development of the game (sounds like the case in this case based on his other answers) as in programming/art/sfx/whatever else.