Remember math? It’s back, in pog form!

Been doing this for years. I evangelize it all the time, and people still don't understand, or they try to make it more complicated than it is. But it's literally THIS easy, so easy. It's not even math at this point, especially if you only double the dollar amount and ignore the change, a kindergartener could do it.

Yet people refuse to learn a "new weird way".

You don't have to understand it, just do it. This is literally the easiest way. I will die on this hill.

Every system I've used and currently use you enter the tip amount, so writing how much you want to tip is actually fine. Though I'll usually ask for you to write in the total or ask if it's fine if I do. Technically the cc company cares about that line in case of disputes.

But the receipt in the OP didnt have any math? They just decided on a total and wrote it down.

That's the thing, it's just so much more effort

Doing some bar hopping at night and paying with card, it becomes completely impossible to really keep track, if the waiter just upped the tip

Or maybe I just was to drunk and have written poorly

It's just a shit system, without a way to directly verify on the spot

In Europe, I usually get a receipt and can write the tip on top of that, than I'll pay everything and get the real receipt, including the tip

Why should I even need to check into a stupid app, I don't even want to have?

It's just so much easier to see the real paid amount at the end

Edit: and just saying, I've been doing that all my life, doesn't make it better
"That's how we've always done it" is the thing that stands against progress

If a system is better, than it's better - and we can compare

So, what I'm up to:
Maybe I'm missing something here, which makes this blind trust better in some way, but nobody told me how

What's the problem with this method? I figure out tips through mental math, without any paper. This is just explaining how I do that mental math

I used to do calculators for tips, but noticed my mental acuity slipping. I started calculating tips in my head to keep myself sharp

This is how I do mental math. Figuring out (100-15)-2 is a lot easier than 100-17

Didn't realize my grandfather was alive and we're still balancing checkbooks by hand