Regra de Tres facil

complete application of rule of three in a simple and easy way (math) the Rule of Tres Facil app is a great tool for learning, simple formula with this excellent application. characteristics: - Rule of 3 very easy to understand. - You don't need internet. - Language entirely in Portuguese. - Explanation of how to do the account. - Great design - Simple three rule calculator * Learn Rule of 3 simple in a very easy way.