Using fractions instead of floats

[richyjsm at gmail.com]

On Oct 1, 8:30 am, Nick Craig-Wood <n... at craig-wood.com> wrote:
>   >>> mpq(1,3)+0.6
>   mpq(14,15)

Golly!  That's quite impressive.  And more than a little bit magic as
well, since 0.6 is definitely not the same as 3/5.  How on earth does
this work?

Richard