VHDL no function declarations for operator "/" Error

I cannot understand your code...
For real operations: did you include the  ieee.math_real.all?

Thanks .i attached my source code.actually its package ...

> i attached my source code.
Thats not the complete code. At least the libraries are missing...

And this seems to be wrong:

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  type rational is array (natural range numer to denom) of integer; -- range -16384 to 16383;

Usually the range of an integer is -2^31 to 2^31-1

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  constant numer : INTEGER := 0; -- numerator

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  constant denom : INTEGER := 1; -- denominator

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  type rational is array (natural range numer to denom) of integer;

Why do you not use a record?
That would be the ideal solution for your fractional number:

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  type Rational is record

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     numer : integer;

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     denom : integer;

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  end record Rational ;

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  -- use it that way:

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  signal a,b: work.ratpack_extras_rational_real.Rational;

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  a.numer <= 123;

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  a.denom <= 12;

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  b <= a;

> Thats not the complete code.
 actually its a complete package.

i will try whatever you suggested,whats the problem in my code.

> no function declarations for operator "/"
There is no definition for a integer division resulting in a float 
value. Try this
   num := real(a(numer))/real(a(denom));

Thanks Lothar Miller..

>    num := real(a(numer))/real(a(denom));

above statment working fine.