How to increase chance to win

it is based on how many people enter a GA, more people means less chances

there is none, if there are 100 people entering 1 giveaway then you have 1% to win that's all :3 Entering more, win more (but hey only enter for games that you wanted to play would be nice too)

It is just simple math. Your chance to win is 1 diveded by the number of entries.
100 entries => 1% chance to win a giveaway.
1000 entries => 0.1% chance to win a giveaway.

The daily chance to win on your stats page is determined by basic statistics (think: tree diagram of probability theory). I can elaborate if you want to.

Your chance of winning is only based on the total number of people that enter the giveaways you are trying to win, nothing else. It is just your calculated odds of winning something that day based on all the giveaways you have entered that end on that day.

If you want better odds of winning, you need to enter giveaways that have less entries. You can do this buy entering group, whitelist, or invite only giveaways. You can also enter giveaways that only allow users to enter that have a higher level on steamgifts. You can make your level higher by creating giveaways for games that have not been given away for free in the past.

For more information you may want to read the FAQ.

I'm talking about the chance of winning per day not the math, that stuff is stupid easy to figure out I mean when I click in top right and drop down gives me my stats and I look at it and it gives me my percent chance to win per dau, how do I increase that

Everyone has the same chance to win. Steam levels does nothing at all and the only thing SG levels do is to allow you to join more giveaways (some are level restricted).
Once joined you have exactly 1/number of entries chance to win and so does everyone else.

If you're talking about the SG stat that shows how likely you are to win a game on a given day, that stats compounds all the giveaways you've joined so if you have a higher % it's because you've joined more giveaways or giveaways with fewer entries. Those numbers will change over time and drop as more people join the giveaways.

Enter more, enter less entered. Later can be achieved by getting to level 10 here.