Final answer:
The fraction equivalent to 0.5% is 1/200, as percentages represent parts per hundred and simplifying 0.5/100 gives us the fraction in its simplest form.
Step-by-step explanation:
The fraction equivalent of 0.5% is B. 1/200. To convert a percentage to a fraction, the percentage is divided by 100. Therefore, 0.5% is equivalent to 0.5/100, which simplifies to 1/200. This is because percentages represent parts per hundred, and by simplifying 0.5/100, we get the simplest form which is a fraction with a denominator of 200.