In a bond portfolio, the following are the present values of all cash flows by annual period:

Year	PV Cash flows (millions)
1	13.4
2	11.4
3	10.4
4	19.3
5	18.6

What is the percentage contribution to duration of the year 3 cash flows?

First, calculate the total duration of the portfolio as sum(year*percent cash flows), then find what percentage of that the year 3 duration factor makes up. Enter answer in percents.

Answer: 13.13