The numbers "0.5" and "1.5" are decimal representations of fractions. Specifically, "0.5" is equivalent to 1/2, meaning half of a whole, while "1.5" represents one and a half, or 3/2. These decimals are commonly used in mathematics, science, and everyday life to express quantities that are not whole numbers. In practical terms, "0.5" can be seen in measurements, such as 0.5 liters of liquid, while "1.5" might refer to 1.5 kilometers in distance. Understanding these values helps in various applications, from cooking to budgeting, where precise amounts are necessary.