# Chapter 5 - Number Theory and the Real Number System - Chapter Summary, Review, and Test - Review Exercises: 53

$\frac{43}{36}$ or $1\frac{7}{36}$

#### Work Step by Step

The fractions are not similar, so convert each addend to a fraction using the LCD, which is 36, to find: $=\dfrac{7(4)}{9(4)} +\dfrac{5(3)}{12(3)} \\=\dfrac{28}{36}+\dfrac{15}{36} \\=\dfrac{28+15}{36} \\=\dfrac{43}{36}$

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