diff --git a/proportions.py b/proportions.py
new file mode 100644
index 0000000..a7958fb
--- /dev/null
+++ b/proportions.py
@@ -0,0 +1,13 @@
+# Put a zero in for the unknown alue
+n1 = 1
+d1 = 2
+n2 = 0
+d2 = 16
+
+if n2==0:
+    answer = d2 * n1 / d1
+    print("n2 = ", answer)
+
+if d2==0:
+    answer = n2 * dl / nl
+    print("d2 = ", answer)