diff --git a/lib.py b/lib.py
index dd70b1c..77e123f 100644
--- a/lib.py
+++ b/lib.py
@@ -6,3 +6,6 @@ def multiply(a: int, b: int) -> int:
 
 def subtract(a: int, b: int) -> int:
     return a - b
+
+def divide(a: int, b: int) -> float:
+    return a / b
diff --git a/test_divide.py b/test_divide.py
new file mode 100644
index 0000000..97b94bf
--- /dev/null
+++ b/test_divide.py
@@ -0,0 +1,4 @@
+from lib import divide
+
+def test_divide():
+    assert divide(1, 2) == 1/2