Final answer:
To convert 0.5 to a percent, move the decimal point two places to the right and add a percent sign.
Step-by-step explanation:
To convert a decimal to a percent, we move the decimal point two places to the right and add a percent sign.
So, to convert 0.5 to a percent, we move the decimal point two places to the right, resulting in 50%. Therefore, the correct answer is option A) 50%.
Learn more about Converting decimal to percent in Mathematics