Step 1: Start with the fraction 70/20.

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

70 ÷ 20 = 3.5

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

3.5 × 100 = 350.0%

Final Answer: 70/20 as a percentage is 350.0%.