# Chapter 3 - Adding and Subtracting Fractions - Summary Exercises - Operations with Fractions: 43

$\frac{15}{45}$

#### Work Step by Step

In order to rewrite $\frac{3}{9}$ with a denominator of 45, we must multiply both the numerator and the denominator of the original fraction by 5. $\frac{3}{9}=\frac{3\times5}{9\times5}=\frac{15}{45}$

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