Step 1: Start with the fraction 42/7.

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

42 ÷ 7 = 6.0

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

6.0 × 100 = 600.0%

Final Answer: 42/7 as a percentage is 600.0%.