Step 1: Start with the fraction 27/31.

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

27 ÷ 31 = 0.871

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

0.871 × 100 = 87.1%

Final Answer: 27/31 as a percentage is 87.1%.