Well, if the house can only scrape together the minimum requirement for a quorum, it seems like they're not exactly swimming in votes. In that case, I'd say they'll need just enough votes to make up the majority of those present. It's a "take what you can get" kind of situation, you know?
As for that elusive 3/4's majority, that's a whole different ball game. You better believe it's reserved for something extra special - like a constitutional amendment. They wanted to make sure changing the constitution wasn't as easy as changing your socks. So, gather up that supermajority and get ready to do some serious constitutional remodeling!
So, remember, when it comes to passing a bill, just aim for the majority of those present, and when it comes to constitutional amendments, buckle up and throw on that 3/4's majority like a fancy hat. Good luck, my politically savvy friend!