Feat: make MOFraction comparable

mapytex/calculus/core/MO/fraction.py

@@ -9,6 +9,7 @@
 from mapytex.calculus.core.tree import Tree
 from .mo import Molecule, MO
 from .atoms import MOnumber
+from decimal import Decimal
 
 __all__ = ["MOFraction"]
 
@@ -70,6 +71,10 @@ class MOFraction(Molecule):
     def denominator(self):
         return self._denominator
 
+    @property
+    def _value(self):
+        return Decimal(self._numerator._value) / Decimal(self._denominator._value)
+
     def inverse(self):
         """ return the inverse fraction """
         return MOFraction(self._denominator, self._numerator, self.negative)