0.5 as a fraction is 1/2. This is because 0.5 represents half of a whole. To convert a decimal to a fraction, you can write the decimal as the numerator and 1 as the denominator. Then, multiply both the numerator and the denominator by 10 until the numerator becomes a whole number. In this case, 0.5 multiplied by 10 becomes 5, and 1 multiplied by 10 becomes 10. So, 0.5 is equivalent to 5/10. Simplifying this fraction by dividing both the numerator and the denominator by 5 gives you 1/2.