Step 1: Start with the fraction 17/20.

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

17 ÷ 20 = 0.85

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

0.85 × 100 = 85.0%

Final Answer: 17/20 as a percentage is 85.0%.