Step 1: Start with the fraction 23/8.

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

23 ÷ 8 = 2.875

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

2.875 × 100 = 287.5%

Final Answer: 23/8 as a percentage is 287.5%.