Simplifying results from rat function

Suppose I have found the decimal value:

0.642857142857143

Which by the way I know to be 9/14

if I go:

result =rat(0.642857142857143)

I get the interesting symbolic output:

'1 + 1/(-3 + 1/(5))'

How do I now go about turning this symbolic numerical expression into something

like '9/14' ?

I thought maybe simplifyFraction would suffice, but looks like that is reserved for algebraic espressionss

Answer 1

[Walter Roberson]

[N,D] = rat(0.642857142857143)

N = 9

D = 14