A portfolio of short-term bonds has one-, two-, and three-year rate durations of 0.45, 0.83, and 1.45, respectively. Currently, the appropriate one-, two-, and three-year yields are 2.49%, 3.29%, and 3.81%, respectively. What is the approximate percentage change in the portfolio value if the one-year yield changes to 2.03%, the two-year yield to 3.49%, and the three-year yield to 3.68%? (Round to the nearest 0.001%, drop the % symbol. E.g., if your answer is -1.2345%, record it as -1.235.)