The calculation with fractions or rational numbers is possible using the setting "rat" in the calculator.
The input of fractions is done by numerator, fraction line "/" and denominator. There are up to 10000
decimal digits available for numerator and denominator, respectively.

For the calculation with fraction numbers there are following arithmetic operations:

- The 4 basic arithmetic operations addition, subtraction, multiplication and division
- Exponentiation
- Roots
- Cancelling down of fractions by entering a fraction number and pressing the equality key on the fraction calculator
- Logarithm calculation
- Trigonometric functions sine, cosine and tangent and the corresponding inverse functions
- Hyperbolic functions
- Conversion between fraction numbers and floating-point numbers if the result is available as a fraction number
- Factorial calculation
- Binomial coefficient "n choose k" with a rational number "n" and a natural number "k"

If the result of a calculation cannot be represented as a fraction number because either the result is not rational or an overflow in the fraction number in numerator or denominator arises the fraction calculator displays an approximated value.