## Basic College Mathematics (9th Edition)

$\frac{17}{24}$
We can perform vertical addition using the same techniques as horizontal addition. The LCM of the original denominators, 12 and 8, is 24. Therefore, we can rewrite the original fractions with a denominator of 24. $\frac{7}{12}+\frac{1}{8}=\frac{7\times2}{12\times2}+\frac{1\times3}{8\times3}=\frac{14}{24}+\frac{3}{24}=\frac{14+3}{24}=\frac{17}{24}$