Convert decimal number $1.25$ to fraction $\frac{125}{100}$. Reduce the fraction $\frac{125}{100}$ to lowest terms by extracting and canceling out $25$.
$$\frac{5}{8}+\frac{5}{4}$$
Least common multiple of $8$ and $4$ is $8$. Convert $\frac{5}{8}$ and $\frac{5}{4}$ to fractions with denominator $8$.
$$\frac{5}{8}+\frac{10}{8}$$
Since $\frac{5}{8}$ and $\frac{10}{8}$ have the same denominator, add them by adding their numerators.
