Step 1: Start with the fraction 40/13.

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

40 ÷ 13 = 3.0769

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

3.0769 × 100 = 307.69%

Final Answer: 40/13 as a percentage is 307.69%.