1 answer
(click or scroll down)
If you are greeting someone who is your age, you would typically use the informal "¿Cómo estás?" to ask "How are you?" in Spanish. The follow-up "¿Y tú?" can be used after someone responds to keep the conversation going.
The other forms, "¿Cómo está?" is more formal, and "¿Qué pasa?" translates more to "What's happening?" or "What's up?" and can also be used in casual greetings, but it's not as directly asking about someone's well-being.
So, the best option for asking "How are you?" when greeting someone your age is: **¿Cómo estás?**