Rationalize
Rationalize[x]
converts an approximate number x to a nearby rational with small denominator.
Rationalize[x,dx]
yields the rational number with smallest denominator that lies within dx of x.
Details

- Rationalize[x,dx] works with exact numbers x.
- Rationalize[x] yields x unchanged if there is no rational number close enough to x to satisfy the condition
, with
chosen to be
.
- Rationalize[x,0] converts any inexact number x to rational form. »
Introduced in 1988
Updated in 1999
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(4.0)