0.5 as a fraction is 1/2. This is because 0.5 represents one-half or one divided by two. To convert a decimal to a fraction, you can place the decimal number over 1 and then multiply the numerator and denominator by 10, 100, or any other power of 10 until the decimal point disappears. In the case of 0.5, you can write it as 0.5/1, then multiply both the numerator and denominator by 2 to get 1/2. Another way to see this is that the number 0.5 can also be written as 50/100, which can then be simplified to 1/2.

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