Question

What does this " : " mean between numbers ?

Answer 1

Answer:

":" normally means to

Explanation:

It is usually used to show ratios.

For Example) 3:4 means "three to every four"  

Answer 2

A colon, when placed between two numbers indicates a ratio. 

For example, 1:1 is saying that something is at a 1-to-1 ratio.

This would be better in the Math section though, but I'm happy to answer.