Step 1: Start with the fraction 39/8.

Step 2: To convert a fraction into a percentage, divide the numerator by the denominator.

39 ÷ 8 = 4.875

Step 3: Multiply the result by 100 to get the percentage.

4.875 × 100 = 487.5%

Final Answer: 39/8 as a percentage is 487.5%.