Chapter 1 - Foundations for Algebra - 1-5 Adding and Subtracting Real Numbers - Practice and Problem-Solving Exercises - Page 34: 29

$\frac{13}{36}$

First, find a common denominator, which in this case is 36. 7/9=28/36, and -5/12 =-15/36. Now just add the numerators together, and you get 13. Now just put that over 36, and you get your answer of $\frac{13}{36}$.