Rational Approximations

The { RAT } selection from the NUMBER THEORY menu lets you calculate a fraction that approximates a specified number, within a given error.

Calculating a Rational Approximation

To calculate the rational approximation of a number:
  1. Select { NUM } from the MATHEMATICS menu.
    The calculator displays the NUMBER THEORY menu.
  2. Select { RAT } from the menu.
    The calculator displays:
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  3. Enter the number you want to approximate and press { x }. This number is not retained when the result is calculated, so you must enter a value for x each time this menu appears.
  4. Enter the allowable error and press { err }. If you enter 0, the result is within the limits of the calculator.
  5. Press { EOD } to continue with the program and calculate the fraction.
    When the approximation is complete, the calculator displays:
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  6. Press { NUM } to display the numerator.
  7. Press { DEN } to display the denominator.

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