That only shows the % discount of the games, not the bundle; since there are multiple discounted games, Steam adds up the discount of the games in total and gets an average.

273/11 = 24.80 rounded to 25%. It's a bit strange that they show it like that since it doesn't matter at all since it takes the value of the products and only applies the discount of the bundle.

valve changed at some point how they display bundle discounts. I guess to reduce confusion for the customer, but i am not sure this way is an improvement. To answer your question, the green 27% discount shown to you is the value you save when compared to the (already reduced) bundle price because of the individual game discounts.

-26% for me and I own none of them

The entire bundle is discounted by 65%.
Besides that, some games are also discounted on their own.
Without discount, all of those games would cost 177,80 bucks for me.
Considering 65% discount, the whole bundle costs 62,24.. which means one would save 115,56 by purchasing it.
The numbers work out, you get an overall discount of 65% if you purchase the entire bundle.
The smaller discounts are only relevant if you want to purchase any of the games individually, it seems.

Steam just has a very weird way of communicating this, the percentages on the shop page are more confusing than helpful.

Six of the games are on my wishlist but I will still skip this bundle. The most relevant game to me would be Manor Lord and that's still in EA.
Given the mixed experiences with early access games, I don't want to risk it, not even for a price of 5,65. If they game never makes it to the point where it gets a full release, that money was basically flushed down the toilet (yes, getting an unfinished EA version isn't appealing to me, sorry, not sorry.)
The other games would end up in my backlog anyways, so what is the point of hoarding even more?

Not all people wait for 80+% discount on Steam or buy games almost exclusively in bundles.

this is called a bundle just because they come together

That's the definition of the word, yeah

value is subjective. i'd rather pay $60 for 10 games i'll have a meaningful time playing than $10 for 60 (or 600) games that i'll never touch.
your attitude above is smug and shitty. not everyone thinks the same and holds the same values as you, get over it.

Most of these games are not published by them, could be featured in future bundles nontheless though.But that's the case for alot of games, especially indie titles.

available for 96 hours

I mean yeah for $20 this is a no brainer if you don't already have everything except the indie games they added in there for the bait. The variety of the 2k pack is huge comparing to the one OP shared.

Technically it's not a bundle, it's a package (you always pay full $20 price regardless if you have some of the games already)

someone make one for it

Please or something, or just do it yourself, instead of ordering people around?

You save 26% on top of the 65% bundle discount resulting in a total discount of approx. 75%.
Compare the final price to the 240 USD advertised total worth, or just calculate the final discount yourself: 1-(1-0.65)*(1-0.26)=0.741 so just short of 75%

same, not interested

Well the 72 USD on the bottom is your personal 65% off bundle price (aka all unownded games) before taking into account any individual discounts of the games. The 31% now gives you your discount on this bundle price because of individual game discounts.

Not sure where you get the "Up to -50%" from, but my guess is they are talking about the sale going on the bundle is part of, with individual games discounted up to 50%

I was thinking about getting Manor Lords elsewhere and complete the bundle but I thought it would be less than $50 if you owned it already. Bummer.

Why do you think Manor Lords is not a hit? It's player numbers are a league above the rest of the bunch.

The game with tens of thousands of reviews is not a hit?

Most of the included games are rather good and worth the asking price, however Manor Lands is ruining it, so if you are not into that, paying 14€ for a demo might be a deal-breaker.