If you're going to use the menu (Insert -> Insert Fraction...),
understand what it's doing. I guess this is getting into more math
then Scheme. There are fractions, improper fractions, and mixed
fractions understand what's happening to them or what you're doing to
them especially when dealing with a negative whole number or a
negative improper fraction.
Below, of course they're not equal. But, -17 7/9 and -16 2/9 can be
reduced. The comparison for equality should use the values -142/9 and
(= (/ -142 9) (/ -146 9)) and this is false.
-1 is atomic; therefore, I assume -146 is atomic. -17 is atomic. -17
7/9 isn't atomic because it's an expression. -17/1 + 7/9
(+ (/ -17 1) (/ 7 9))
The kids are screaming... I have to play with them.