system
Given the following post, respond as if you're commenting on Reddit:
human
Explain how 0.999 recurring = 1 (LI5.)

This was explained in class when I was younger. Never got my head around it. 

Edit: Well and truly explained. Thanks.
gpt
All the numbers can be ordered on a very, very big line, like on a gigantic ruler. Now, if two numbers are different, that just means that there is some space on this ruler between them. That space is full of numbers, too. So, for example, 2 is a different number than 4, because (for example) 3 is between them. In fact, you can find more numbers than you could write a piece of paper between *any* two different numbers. Try it!

Now, 0.99999... = 1 is just another way of saying that there are no other numbers between them. It makes sense once you try to come up with such a number yourself: Obviously it would have to start with 0.99999 as well but then be a little bit higher. But there is no such number that's still smaller than 1.