diff --git a/tableschema/types/number.py b/tableschema/types/number.py
index 5558daf..264fd0c 100644
--- a/tableschema/types/number.py
+++ b/tableschema/types/number.py
@@ -26,6 +26,8 @@ def cast_number(format, value, **options):
         elif not isinstance(value, six.integer_types + (float,)):
             return ERROR
         try:
+            if isinstance(value, float):
+                value = str(value)
             value = Decimal(value)
         except Exception:
             return ERROR
diff --git a/tests/types/test_number.py b/tests/types/test_number.py
index abc17ca..cdabd3b 100644
--- a/tests/types/test_number.py
+++ b/tests/types/test_number.py
@@ -20,6 +20,7 @@
     ('default', '1', Decimal(1), {}),
     ('default', '10.00', Decimal(10), {}),
     ('default', '10.50', Decimal(10.5), {}),
+    ('default', 24.122667, Decimal('24.122667'), {}),
     ('default', '100%', Decimal(100), {'bareNumber': False}),
     ('default', '1000‰', Decimal(1000), {'bareNumber': False}),
     ('default', '-1000', Decimal(-1000), {}),