Step 1: Start with the fraction 40/15.

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

40 ÷ 15 = 2.6667

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

2.6667 × 100 = 266.67%

Final Answer: 40/15 as a percentage is 266.67%.