Step 1: Start with the fraction 18/15.

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

18 ÷ 15 = 1.2

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

1.2 × 100 = 120.0%

Final Answer: 18/15 as a percentage is 120.0%.