Step 1: Start with the fraction 42/27.

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

42 ÷ 27 = 1.5556

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

1.5556 × 100 = 155.56%

Final Answer: 42/27 as a percentage is 155.56%.