You are saving for retirement. On April 1, you deposit $510 in your target-date fund. By May 15, your initial deposit is worth $538 and you deposit an additional $284 at that time. On August 15, your account shows a value of $817 and you make a further deposit of $280. On November 30, your account shows a balance of $1,131. What is your time-weighted return (in percent) for the period April 1 - November 30? Answer to two decimals. Carry intermediate calculations to six decimals.