1. **State the problem:** Find what percent 8 is of 128. 2. **Formula:** To find what percent a number $A$ is of another number $B$, use the formula: $$\text{Percent} = \left(\frac{A}{B}\right) \times 100$$ 3. **Apply the formula:** Substitute $A=8$ and $B=128$: $$\text{Percent} = \left(\frac{8}{128}\right) \times 100$$ 4. **Simplify the fraction:** $$\frac{8}{128} = \frac{\cancel{8}^1}{\cancel{8}^{16}} = \frac{1}{16}$$ 5. **Calculate the percent:** $$\frac{1}{16} \times 100 = \frac{100}{16} = 6.25$$ 6. **Answer:** 8 is 6.25 percent of 128.