Step 1: Start with the fraction 42/70.

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

42 ÷ 70 = 0.6

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

0.6 × 100 = 60.0%

Final Answer: 42/70 as a percentage is 60.0%.