How to reply how are you and ask back?

This is a very good question. It is important for conversation.

A simple and polite way is to answer, say thanks, and ask back. For example: “I’m doing well, thanks. How are you?” Or you can be more casual, like: “Pretty good. How about you?” Using “And you?” is also very easy and common. “I’m good, thanks. And you?”

It is very polite to ask the question back. It shows you are interested in the other person. In Canada, almost everyone asks back. It is just a nice thing to do, eh? So, always try to remember to ask them too. You can mix any of these. They all work great.