# [plt-scheme] DrScheme Can't Insert Negative Fractions?

I think "-17 7/9" means -17 + 7/9 and not -(17 + 7/9) , to get the
right answer
make whole part and numerator negative .
On 8/31/08, Grant Rettke <grettke at acm.org> wrote:
>* This message was originally posted here:
*>* http://groups.google.com/group/study-htdp/browse_thread/thread/4be081a64769dcfb
*>* by my friend Kartik.
*>* I cross-posted it on his behalf so that he might have an answer in the
*>* morning (his time). BTW, we haven't discussed check-result and
*>* check-within, yet.
*>* ;;
*>* While attempting to solve fahrenheit to celsius problem I was trying
*>* to add a simple test which tests the following condition
*>*
*>* (= (fahrenheit-to-celsius 0) -17 7/9)
*>*
*>* DrScheme allows adding fractions via Menu->Special->Insert Fraction.
*>* However, when I try inserting a fraction for -17 7/9 it gets converted
*>* to -16 2/9.
*>*
*>* Is this a bug? 17 7/9 by itself gets added properly but not its
*>* equivalent negative value.
*>* _________________________________________________
*>* For list-related administrative tasks:
*>* http://list.cs.brown.edu/mailman/listinfo/plt-scheme
*>*
*