# frac

Rational approximation to a floating point number with bounded denominator.

Uses the Mediant Method <https://en.wikipedia.org/wiki/Mediant_(mathematics)>

## JS Installation and Usage

In node:

    $ npm install frac

In the browser:

    <script src="frac.js"></script>

The exported `frac` function takes three arguments:

 - `x` the number we wish to approximate
 - `D` the maximum denominator
 - `mixed` if true, return a mixed fraction (default); if false, improper

The return value is an array of the form `[quot, num, den]` where `quot==0`
for improper fractions.

For example:

```
> // var frac = require('frac'); // uncomment this line if in node
> frac(Math.PI,100) // [ 0, 22, 7 ]
> frac(Math.PI,100,true) // [ 3, 1, 7 ]
```