The document defines fractions including proper fractions, improper fractions, and mixed numbers. It provides examples of fractions written in fractional form with numerators and denominators. Key terms are introduced such as the numerator, denominator, proper fractions which are less than 1, improper fractions which are greater than 1, and mixed numbers which are a combination of a whole number and a fraction. Examples of adding and converting between proper, improper, and mixed numbers are also included.