diff -r fa745ed89b7a Lib/fractions.py
--- a/Lib/fractions.py	Thu Aug 23 15:53:45 2012 +0200
+++ b/Lib/fractions.py	Thu Aug 23 11:52:57 2012 -0500
@@ -208,6 +208,16 @@
         else:
             return cls(digits, 10 ** -exp)
 
+    def as_decimal(self, context=None):
+        """Returns a Decimal representation created using context, if
+        supplied.
+        """
+        if context is not None:
+            from decimal import localcontext
+            with localcontext(context):
+                return Decimal(self.numerator) / Decimal(self.denominator)
+        return Decimal(self.numerator) / Decimal(self.denominator)
+
     def limit_denominator(self, max_denominator=1000000):
         """Closest Fraction to self with denominator at most max_denominator.