1. **State the problem:** ABC Company has 80 employees and currently has $\frac{1}{4}$ fewer computers than employees. They plan to hire 5% more employees. We need to find how many computers they must buy so each employee has one computer. 2. **Calculate current number of employees:** Current employees = 80 3. **Calculate current number of computers:** Since computers are $\frac{1}{4}$ fewer than employees, the number of computers is: $$\text{Computers} = 80 - \frac{1}{4} \times 80 = 80 - 20 = 60$$ 4. **Calculate new number of employees after hiring 5% more:** $$\text{New employees} = 80 + 0.05 \times 80 = 80 + 4 = 84$$ 5. **Calculate how many computers are needed for 84 employees:** Each employee needs 1 computer, so 84 computers are needed. 6. **Calculate how many computers to buy:** $$\text{Computers to buy} = 84 - 60 = 24$$ **Final answer:** They need to buy **24 computers** to ensure each employee has one.