Step 1: Start with the fraction 100/28.

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

100 ÷ 28 = 3.5714

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

3.5714 × 100 = 357.14%

Final Answer: 100/28 as a percentage is 357.14%.