You have three stocks in your portfolio. You invested 30% of your money in A, 40% in B, and 30% in C. Over the past year, Stock A had 10% return; stock B had 5% return, Stock C had -5% return. What is your portfolio return? Please write your answer as a percentage without percentage sign (e.g. if your answer is 10.50%, write 10.50 without the percentage sign)