To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $8a$ and $5$ is $40a$. Multiply $\frac{25+1a}{8a}$ times $\frac{5}{5}$. Multiply $\frac{2}{5}$ times $\frac{8a}{8a}$.
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $8a$ and $5$ is $40a$. Multiply $\frac{25+1a}{8a}$ times $\frac{5}{5}$. Multiply $\frac{2}{5}$ times $\frac{8a}{8a}$.
