I'm not a programmer so I don't know the language, just thought I'd share.
Enter in (-1/3) gives answer approximation=> works with any negative repeating decimal approx.
hilight number approximation and multiply times 6. Enter
answer is -2.
now enter (ANS)+1
the answer is -.9999999998
Any clue on why? Seems like a programming error since it works for positive repeating fractions. Also if you click ANS and do not highlight the approx. it does not work.