## Prealgebra (7th Edition)

$\frac{49}{50}$
$\frac{17}{25}+\frac{3}{10}$ The least common multiple of the denominators is 50. $\frac{17\times2}{25\times2}+\frac{3\times5}{10\times5}=\frac{34}{50}+\frac{15}{50}=\frac{49}{50}$