Please show work- no excel

You plan to invest $10,000 in a stock, borrowing $6,000 of the cost from a friend, thus putting up $4,000 of your own money. The cost of debt is 12%, and there are no taxes or transaction costs. With this arrangement, you expect a return of 20% on your equity investment. What would your expect your return to be without he leverage? That is, what would your return be if you didn't borrow any money and instead, the entire $10,000 invested was your money? (percent with 2 decimals) 15.2