Try Perl function "sprintf".

I'd say

#!/usr/bin/perl -w
# This will round the value of Y to two decimal points, using ".2f"
$Y=14.875;
$roundedY= sprintf "%.2f", $Y;
print "$roundedY \n";
exit;

For more details look at sprintf - formatted print into a string

The same is in C and Korn in the man pages. I hope this helps.

Good luck