1. **State the problem:** We have 60 books in total, and 24 of them are nonfiction. We need to find what percent of the books are nonfiction. 2. **Formula:** To find the percentage, use the formula: $$\text{Percentage} = \left(\frac{\text{Part}}{\text{Whole}}\right) \times 100$$ 3. **Apply the formula:** Here, the part is 24 (nonfiction books) and the whole is 60 (total books). So, $$\text{Percentage} = \left(\frac{24}{60}\right) \times 100$$ 4. **Simplify the fraction:** $$\frac{24}{60} = \frac{\cancel{24}}{\cancel{60}} = \frac{2}{5}$$ 5. **Calculate the percentage:** $$\frac{2}{5} \times 100 = 2 \times \frac{100}{5} = 2 \times 20 = 40$$ 6. **Answer:** 40% of the books are nonfiction.