Both of the other responses give you excellent suggestions. I might also add to pay close attention that the fractions refer to only his working life. The first few of my students who tried this problem were trying to include the first 15 years in the problem instead of add it on at the end. The ability to add fractions is a real plus to solving this problem.
On 17 Dec 2004, Lisa wrote: >My class is having such a hard time with this problem. We are >stumped! Can anyone give us some hints for solving this problem??? >THANKS!