Final answer:
The ratio of 2:3 expressed as a fraction in its simplest form is 2/3. This represents a comparative relationship between two quantities.
Step-by-step explanation:
A ratio of 2:3 expressed as a fraction in its simplest form is 2/3. Ratios compare two quantities and can be written as fractions, which consist of a numerator and a denominator. The given ratio is already in its simplest form as a fraction, with 2 being the numerator and 3 being the denominator. This means for every two parts of one quantity, there are three parts of another quantity. Ratios can be used in various contexts, such as scale distances, proportions in reactions in chemistry, and genetics, just as they are important in calculating scale factors and understanding scale measurements.