I have not read the whole thread. But perhaps this is close (if you can depend on the 'divide' delimiter):
New Table( "Convert Char Fraction",
Add Rows( 4 ),
New Column( "Char Fraction",
Character,
"Nominal",
Set Values( {"4 / 5", "3/2", "27/ 26", "122 /37.6"} )
),
New Column( "Result",
Numeric,
"Continuous",
Format( "Fixed Dec", 12, 3 ),
Formula(
Num( Trim( Word( 1, :Char Fraction, "/" ) ) ) /
Num( Trim( Word( 2, :Char Fraction, "/" ) ) )
)
)
);