# [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
*
ok , what i meant was when you enter -17 in whole part and 7 and 9 in
numerator and
denominator , then the expression became -17 + 7/9 which is not same as -17 7/9
and -17 7/9 is indeed -(17 + 7/9) .
On 8/31/08, Veer <diggerrrrr at gmail.com> wrote:
>* 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
*>>*
*>*
*