Step 1: Start with the fraction 15/13.

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

15 ÷ 13 = 1.1538

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

1.1538 × 100 = 115.38%

Final Answer: 15/13 as a percentage is 115.38%.