A lot more information needed as per the questions already asked: How much has been created already? Are they part-time also? * Has any money been put in? B

A lot more information needed as per the questions already asked: How much has been created already? Are they part-time also? * Has any money been put in? But the truthful answer is that it's a negotiation between individuals, rather than a set amount, so figure out why the really need you and how you will turn around the fate of the company, making their equity worth more, and play on that.