How do you say hello how are in welsh?

The phrase "hello, how are you?" in Welsh depends on the formality of the situation. Here are a few options:

Informal:

* "Helo, sut mae?" (pronounced: hello, soot my) - This is a very common and friendly greeting.

Formal:

* "Helo, sut mae chi?" (pronounced: hello, soot my chi) - This is a more formal version of the greeting, used when addressing someone you don't know well or in a professional setting.

More formal:

* "Dydd da, sut mae chwi?" (pronounced: dith da, soot my chwi) - This is a very formal greeting, used when addressing someone you don't know at all or in a very formal setting.

Note: "Sut mae chi" is the singular form, while "sut mae chwi" is the plural form. You would use the plural form when addressing multiple people.

It's also common to add a "da iawn" (pronounced: da ion) after "sut mae?" meaning "very well" or "good."