Rational numbers (fractions)

Sometimes you want to handle a ratio as its own entity. Yeah, you could downcast to decimal (though on floating point that's really a crime), or encode it as a string, but neither of those really cuts it.

So why not `npm install ratio`

?

`var ratio = half = half === 05 // true half === '1/2' // true === '1/50'`

- flexible instantiation:
- from numerator and denominator
- from string
- from decimal number

- nice rendering
`valueOf()`

returns numeric form`toString()`

renders fractional form

- automatically reduces fractions on creation
- fraction arithmetic
- addition with
`r.plus(x)`

- subtraction with
`r.minus(x)`

- multiplication with
`r.times(x)`

- division with
`r.div(x)`

- reciprocal with
`r.reciprocal()`

- negative with
`r.neg()`

- addition with

- render unicode fractions?