John opens a brokerage account and purchases $300$ shares of Internet Dreams at $$40$ per share. He borrows $$4,000$ from his broker to help pay for the purchase. Assume the broker has a maintenance margin requirement of $30\%.$ Assume John owes $8\%$ interest for the loan.

If the share price falls to $$30$ per share what is the remaining percent margin in his account? Will John get a margin call?