Step 1: Start with the fraction 15/7.

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

15 ÷ 7 = 2.1429

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

2.1429 × 100 = 214.29%

Final Answer: 15/7 as a percentage is 214.29%.