From Clomosy Docs
function Frac(const X: Extended): Extended;
The Frac function returns the fractional part of a floating point number.
Example
var
numberValue : Integer;
{
numberValue = 12.75;
ShowMessage(' Frac(12.75) = '+FloatToStr(Frac(numberValue)));
}
Output:
Frac(12.75) = 0,75