Originally Posted by
Jhevon the formula for the present value, $\displaystyle P$, is given by
$\displaystyle P = \frac F{(1 + r)^n}$
where $\displaystyle F$ is the future value of the money, in this case, the value at maturity, $\displaystyle r$ is the interest rate in decimal form, and $\displaystyle n$ is the number of years it will take to get to $\displaystyle F$, which in this case, is $\displaystyle \frac {67}6 \approx 11.167$.
now to find $\displaystyle F$, use the regular compound interest formula, then plug it into the formula above to find the present value