Added test for fraction conversion to decimal as well as corresponding functionality

src/main/py/fractions.py

@@ -0,0 +1,2 @@
+def frac_to_dec(num, denom):
+    return num/denom

src/test/py/test_fractions.py

@@ -0,0 +1,17 @@
+import unittest
+from src.main.py.fractions import *
+
+
+class fractions(unittest.TestCase):
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def test_dec_value_of_20_by_5_should_be_4(self):
+        self.assertEqual(frac_to_dec(20,5), 4)  # add assertion here
+
+
+if __name__ == '__main__':
+    unittest.main()