Try Alex Shinn's fmt:

http://synthcode.com/scheme/fmt/

Brad

On May 1, 2013, at 8:17 AM, Mikael <mikael.rcv@gmail.com> wrote:

> > (number->string (exact->inexact (/ 1 10000)))
> "1e-4"
> > (number->string (/ 1 10000))
> "1/10000"
>
>
> The same with other similar values such as 0.00085 .
>
>

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