1. **State the problem:** We need to find how many students out of 680 said the 4th of July was their favorite holiday, given that 35% of students chose it. 2. **Formula used:** To find the number of students, use the formula: $$\text{Number of students} = \text{Total students} \times \text{Percentage (as a decimal)}$$ 3. **Convert percentage to decimal:** $$35\% = \frac{35}{100} = 0.35$$ 4. **Calculate the number of students:** $$\text{Number of students} = 680 \times 0.35$$ 5. **Perform multiplication:** $$680 \times 0.35 = 238$$ 6. **Final answer:** 238 students said the 4th of July was their favorite holiday.