Step 1: Start with the fraction 3/81.

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

3 ÷ 81 = 0.037

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

0.037 × 100 = 3.7%

Final Answer: 3/81 as a percentage is 3.7%.