1. **State the problem:** Lena has $\frac{1}{8}$ of a cup of sprinkles to divide equally over 2 sundaes. We need to find how many cups of sprinkles each sundae gets. 2. **Formula used:** When dividing a fraction by a whole number, use the formula: $$\text{Result} = \frac{\text{Fraction}}{\text{Whole number}}$$ 3. **Apply the formula:** $$\frac{1}{8} \div 2 = \frac{1}{8} \times \frac{1}{2}$$ 4. **Multiply the fractions:** $$\frac{1}{8} \times \frac{1}{2} = \frac{1 \times 1}{8 \times 2} = \frac{1}{16}$$ 5. **Interpretation:** Each sundae gets $\frac{1}{16}$ of a cup of sprinkles. **Final answer:** Each sundae gets $\frac{1}{16}$ cups of sprinkles.