1. The problem asks: "Twenty-four is .....% of 80." We need to find what percentage 24 is of 80. 2. The formula to find the percentage is: $$\text{Percentage} = \left(\frac{\text{Part}}{\text{Whole}}\right) \times 100$$ 3. Here, the "Part" is 24 and the "Whole" is 80. Substitute these values into the formula: $$\text{Percentage} = \left(\frac{24}{80}\right) \times 100$$ 4. Simplify the fraction $\frac{24}{80}$ by dividing numerator and denominator by their greatest common divisor, which is 8: $$\frac{\cancel{24}^{3}}{\cancel{80}^{10}}$$ 5. Now the fraction is $\frac{3}{10}$. Multiply by 100: $$\frac{3}{10} \times 100 = 3 \times 10 = 30$$ 6. Therefore, 24 is 30% of 80. Final answer: **30%**