Expand $\frac{0.3}{0.5}$ by multiplying both numerator and the denominator by $10$.
$$\frac{3}{5}+0.321\times 3.32$$
Multiply $0.321$ and $3.32$ to get $1.06572$.
$$\frac{3}{5}+1.06572$$
Convert decimal number $1.06572$ to fraction $\frac{106572}{100000}$. Reduce the fraction $\frac{106572}{100000}$ to lowest terms by extracting and canceling out $4$.
$$\frac{3}{5}+\frac{26643}{25000}$$
Least common multiple of $5$ and $25000$ is $25000$. Convert $\frac{3}{5}$ and $\frac{26643}{25000}$ to fractions with denominator $25000$.
$$\frac{15000}{25000}+\frac{26643}{25000}$$
Since $\frac{15000}{25000}$ and $\frac{26643}{25000}$ have the same denominator, add them by adding their numerators.