R3 - Math. Practical Rule of 3 description

With the application R3 may calculate a simple rule of three ( cross multiply ) quickly and easily.

Unlike other applications, three rules to calculate direct and indirect way , and also you can use decimals.

It is a free app, permissions are for advertising .

Do not miss the opportunity to perform mathematical operations conveniently and easily.

tags: math, education, rule of three, rule of three