The expression is:

$\frac{1}{8} + \frac{1}{16}$

To solve this, first find the least common denominator (LCD) of 8 and 16. The LCD is 16.

Now, rewrite $\frac{1}{8}$ with the denominator of 16:

$\frac{1}{8} = \frac{2}{16}$

Now, add:

$\frac{2}{16} + \frac{1}{16} = \frac{3}{16}$

So, the answer is:

$\frac{3}{16}$

Would you like more details or have any questions?

---

Here are 8 related questions for practice:

1. What is $\frac{3}{4} + \frac{1}{8}$?
2. What is $\frac{5}{12} + \frac{1}{4}$?
3. How do you find the least common denominator of two fractions?
4. What is $\frac{7}{10} + \frac{1}{5}$?
5. How do you simplify a fraction like $\frac{9}{18}$?
6. What is the result of $\frac{1}{3} + \frac{1}{6}$?
7. How do you convert a fraction into a decimal?
8. What is $\frac{2}{9} + \frac{1}{3}$?

Tip: Always check if you can simplify fractions after performing operations like addition or subtraction.