What is 0.5 in a fraction?

0.5 is spoken as "five tenths," which means five out of 10. You could write your fraction as 5/10, but then you would have to simplify it. To simplify, find the largest number that you can divide both the numerator and the denominator by evenly. In this case that number is 5, because you can evenly divide both 5 and 10 by 5. Once you do that you're left with 1/2, which is your simplified fraction form of 0.5.