# RPN Fraction Calculator

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Fraction Calculators are just like any other calculator except they perform arithmetic operations on fractions instead of decimal numbers. All four aritmetic operations are permited in fraction calculators and the typical rules related to fractions still apply.

Since fraction calculators perform arithmetically on fractions, only rational numbers are permited. Therefore, as you might have guessed, there is no calculation using PI, square roots and there is no decimal point key. Because whole numbers are rational numbers (their denominator is the number "1"), fraction calculators can perform operations on whole numbers. Since the "/" is taken for separation between the numerator and denominator, another key expression must be used to represent the division operator. For the current rendition, the key that is responsible for division is printed with the words "Div".

Typically, calculators are divided into two categories: Reverse Polish Notation (RPN) and Algebraic Notation (or infix notation). These different types of calculators are simply an indicator of how the arithmetic operator (+,-, * /) is noted in relation to the operands. Typically, Hewlett Packard is given credit for using RPN in calculators. Most other calculator manufacturers use infix notation--even HP is now releasing some of their calculators in infix notation. There are benefits and drawbacks to both types of notations.

Last updated on

**December 20th, 2007**