RULE OF THREE

The Android application generates equivalent fractions in which a term is omitted. You have to write the omitted term. Equivalent fractions, equivalent ratios and direct proportions are different faces of the same problem. Once you understand any of them you will solve all of them.

The HOMEWORK option sends by email 10 problems with solutions.

The LAST option allows send by email the last ten activities and helps teachers to control pupils' evolution.

The WAYS option displays equivalences in different ways. The YOURS option is a simple calculator of proportions.

The LINKS option provides some interesting links and displays a description of the application's options.

The SCORE option set to zero the score.

The HELP option shows the key idea to understand the application.

LAST, WAYS, YOURS and LINKS options are not included in the free version of the application.