Okay so you'd think that if we had all even numbers it would be 1/2 of infinity, right? Sorry, got to prove you wrong there bud. Even though a set of all whole numbers is more dense, every even number can be matched with a whole number. Here are some examples.

2 to 1

2 to 4

3 to 6

4 to 8

etc.

Fun Fact: I took it a step further to remind myself the all you have to do is take the whole number and multiply it by two to find the even number it matches up with.

So this is kind of saying that infinity divided by two is still infinity. Same goes for adding one. Infinity plus one equals infinity.