Step 1: Start with the fraction 40/3.

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

40 ÷ 3 = 13.3333

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

13.3333 × 100 = 1333.33%

Final Answer: 40/3 as a percentage is 1333.33%.