Step 1: Start with the fraction 19/4.

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

19 ÷ 4 = 4.75

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

4.75 × 100 = 475.0%

Final Answer: 19/4 as a percentage is 475.0%.