Question

Find the sum:
$\frac{4}{15}+\frac{17}{20}$

Answer 1

L.C.M. of 15 and 20 = (3 $\times$ 5 $\times$ 2 $\times$ 2) = 60


$$\begin{gathered} \therefore \frac{4}{15}+\frac{17}{20}=\frac{\left(16+51\right)}{60}\left\{\left[60÷15=4,4\times 4=16\right]\mathrm{and}\left[60÷20=3,17\times 3=51\right]\right\} \\ =\frac{67}{60}=1\frac{7}{60} \end{gathered}$$