diff --git a/num2words/__init__.py b/num2words/__init__.py
index ac84888..6df724c 100644
--- a/num2words/__init__.py
+++ b/num2words/__init__.py
@@ -101,6 +101,8 @@ def num2words(number, ordinal=False, lang='en', to='cardinal', **kwargs):
     if lang not in CONVERTER_CLASSES:
         raise NotImplementedError()
     converter = CONVERTER_CLASSES[lang]
+    if isinstance(number, str):
+        number = converter.str_to_number(number)
     # backwards compatible
     if ordinal:
         return converter.to_ordinal(number)
diff --git a/num2words/base.py b/num2words/base.py
index 4397381..de28116 100644
--- a/num2words/base.py
+++ b/num2words/base.py
@@ -97,6 +97,9 @@ class Num2Word_Base(object):
             return '%s ' % self.negword, num_str[1:]
         return '', num_str
 
+    def str_to_number(self, value):
+        return Decimal(value)
+
     def to_cardinal(self, value):
         try:
             assert int(value) == value
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 484a8dc..00fc50c 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -87,7 +87,7 @@ class CliTestCase(unittest.TestCase):
         self.assertEqual(output.return_code, 0)
         self.assertEqual(
             output.out.strip(),
-            "one hundred and fifty point zero"
+            "one hundred and fifty"
         )
 
     def test_cli_with_lang(self):
@@ -97,7 +97,7 @@ class CliTestCase(unittest.TestCase):
         self.assertEqual(output.return_code, 0)
         self.assertEqual(
             output.out.strip(),
-            "ciento cincuenta punto cero"
+            "ciento cincuenta"
         )
 
     def test_cli_with_lang_to(self):