The stock price of Apple is $107. You have $10,000 to invest. The monthly interest rate charged by your broker is 0.6%, and interest expense is deducted from your account at the end of each month. If you buy 115 shares using your $10,000 and then borrow the rest of the required funds from your broker

Q: Two months later, the stock price is $127. What is your percentage margin (entered as a decimal number)?