The Japanese girl, Miho, in the earlier bagel case, estimates that she would need to invest about $50,000 to purchase the necessary supplies and equipment. She has $20,000 in savings, but still needs additional $30,000. One of her best friends, Amy, is willing to write her the check of $30,000, if she is willing to sell Amy an equity stake in the business. Miho really likes the idea of owning her bagel business outright. 

What percentage of her total equity she should offer Amy in exchange for $30,000. She could also try to take loans from Banks.