Step 1: Start with the fraction 15/20.

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

15 ÷ 20 = 0.75

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

0.75 × 100 = 75.0%

Final Answer: 15/20 as a percentage is 75.0%.