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DutiApp

About this app

The simple rule of three in mathematics is a way of finding one value from three others, divided into related pairs whose values ​​have the same magnitude and unit.

The rule of three is a mathematical process for solving many problems that involve two or more directly or inversely proportional quantities. ... In other words, the rule of three allows you to discover an unidentified value, through another three.

NOTE: Two quantities are called directly proportional when their actions correspond; "increasing one, the other increases". When actions are contrary; "decreasing one another increases", we can say that the quantities are inversely proportional.

This method of resolution has a lot of application not only in mathematics, but also in physics, chemistry and in constant everyday situations (cooking recipes, preparation of solutions, medications,...).

DIRECTIONS FOR USE:

Note: Note that "Value 1" and "Value 3" belong to one magnitude (Hours, Objects, Speed,...) and "Value 2" and "Solution X" belong to another magnitude (Time, Price, Deadline,...)

Enter Values ​​1, 2 and 3 in their locations. Analyze the quantities if they are directly proportional or Inversely proportional and click on the corresponding button ("DIRECT" or "REVERSE"). You will be presented with the solution!

For a new calculation, 'click' on "New Calculation"

PERMISSIONS:

No special permissions required. Contains links to Google Play.

WHO ARE THE USERS:

Housewives, Confectioners, Culinary Chefs, Students, Calculators, Production Technicians.

OBJECTIVE:

Assists you in calculations wherever and with whatever you need!

May it be useful to you! - Get the Full version with an "Interpolator".

* Send found problems or suggestions to us: [e-mail]

What’s new

Adequação a API - 2025