Question

Solve: $\frac{4}{9}+\frac{2}{7}$

Answer 1

For the $1^{st}$ fraction, since $9\times 7=63$

$\frac{4}{9}=\frac{4\times 7}{9\times 7}=\frac{28}{63}$

likewise for the $2^{nd}$ fraction,since $7\times 9=63$

$\frac{2}{7}=\frac{2\times 9}{7\times 9}=\frac{18}{63}$

Add the two fraction

$\frac{28}{63}=\frac{28+18}{63}=\frac{46}{63}$