You are saving for retirement. On April 1, you deposit $504 in your target-date fund. By May 15, your initial deposit is worth $521 and you deposit an additional $299 at that time. On August 15, your account shows a value of $842 and you make a further deposit of $255. On November 30, your account shows a balance of $1,074. What is your time-weighted return (in percent) for the period April 1 - November 30?