"Como vai você?" (formal) or "Como vai?" (informal)
Here's a breakdown of the phrases:
* Como: How
* vai: goes
* você: you (formal)
* vai: goes (informal)
You can also use "Tudo bem?" (Everything okay?) as a common greeting similar to "How are you?".
Here are some additional tips:
* Formal vs. Informal: Use "Como vai você?" with someone you don't know well or are in a formal setting. Use "Como vai?" with friends or family.
* Response: A common response to "Como vai você?" or "Como vai?" is "Bem, obrigado(a)" (Well, thank you) or "Estou bem, e você?" (I am well, and you?).
Let me know if you have any other questions!