Answer
(a) $\frac{17}{30}$
(b) $\frac{9}{20}$
Work Step by Step
(a) $\frac{3}{10}+\frac{4}{15}$
Least Common Denominator of 10 and 15 = 30
Therefore, $\frac{9}{30}+\frac{8}{30} = \frac{17}{30}$
(b) $\frac{1}{4}+\frac{1}{5}$
Least Common Denominator of 4 and 5 = 20
Therefore, $\frac{5}{20}+\frac{4}{20} = \frac{9}{20}$
