This application of Editorial Editex S.A. Performs basic operations with fractions. It includes the following sections: - Theory: contains a document in PDF format with a summary of contents.
 - Practice: in addition to calculating basic operations with fractions, it allows you to convert decimal to fraction, simplify fractions, as well as show if two fractions are equivalent and order them.
 - Test: allows you to perform a self-assessment with 10 test-type exercises collected randomly.
 - Problems: this section is intended to solve problems, one solved by way of example and another 5 proposed to the user.