Duration and weights

Calculated the duration of an annual bond with 3 years to maturity, an interest rate of 12.64% and a coupon rate of 10.59%.

Calculate the present value of each individual cash flow of the bond

time	1	2	3
cash flows	105.9	105.9	1,105.9
present value

What is the current price of the bond?

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Calculate the weights, that is the percent of the value of cash flows that come in the corresponding year.

time	1	2	3
weights	%	%	%

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Calculate the weight * time for each year.

time	1	2	3
weights * time

What is the bond's duration?