*Please show work and explain*

Assume you sell short 100 shares of common stock at $53.23 per share, with initial margin at 50%. What would be your holding period return if you repurchase the stock at $37.32 per share? The stock paid no dividends during the period, and you did not remove any money from the account before making the offsetting transaction. (Ignore any interest owed to the lender)

Show answer in percentage terms to two place.