Hi ,

 

I have attached my solution to question 9 (n) in the Practise Problems from Lesson 2 solving the question using fractions rather than the "show-off" technique I do in my solutions.  I strongly recommend you solve this problem with fractions.  Be sure to review the section on how to add/subtract fractions on page 64 (just before question 10) in Lesson 2 to help understand how to do the fraction math.

 

Grant