The decimal command returns x expressed as a floating-point number rounded to n decimal places.

Trailing zeros are truncated and not displayed.

$\mathrm{MapleTA}:-\mathrm{Builtin}:-\mathrm{decimal}\left(3\,20.8571\right)$

$20.857$

$\mathrm{MapleTA}:-\mathrm{Builtin}:-\mathrm{decimal}\left(3\,20.8579\right)$

$20.858$

The MapleTA[Builtin][decimal] command was introduced in Maple 18.

For more information on Maple 18 changes, see Updates in Maple 18.