Hello guys

So here's the thing I've been struggling with this for quite some time now, maybe you guys have a trick. I've been training pot odds for a while now so I got a good grip on those and I can quickly calculate them.

The thing is, I can't compare them with my odds of improving because I can't calculate them fast enough. So I may know I have 5-to-1 pot odds, but I don't know what to do next. I read the article about Outs and Odds but to be fair the calculations are a bit tricky to do at the table. Cards that help/Remaining is just too hard without a calculator. And the simpler cards that don't help - to - cards that help is better, but I wonder if there's an even better way.

Even if I do the 2/3 * Outs to calculate the probability trick, it's still a struggle, because now say I have a 15% probability of winning with 4-to-1 pot odds... Still can't compare those unless I find a quick way to convert those 15% to the odds format. I can do 1/5 and find those pot odds are "equal" to 20%, but the numbers aren't always this easy.

Basically is there any quick way to tell what my odds of winning are (in the x-to-y format, not %) mentally, without using calculators or software or printing tables? Because the thing is if I'm always looking for a table or using a calculator when playing, after a short while I stop caring about the odds because it's just too much trouble and it's too repetitive and boring. And I'm also not going to use/buy a HUD until I have a good grasp in the game by myself...

I've read the article about 5-6 times but still couldn't find a way to do this. Maybe it's there somewhere and I just don't find it? Does anyone have any quick trick?

Thank you all in advance and good luck at the tables