Assume that as an investor, you decide to invest 33% of your wealth in a risky asset that has an expected return of 24%, and a standard deviation of 23%. You invest the rest of your capital in the risk-free rate, which offers a return of 3%. What is your portfolio's standard deviation? Enter your answer as a percentage, without the percentage sign ('%'), and rounded to the nearest 2 decimals. For example, if your answer is 0.12345, then the return is 12.35%, so just enter 12.35.