diff --git a/ch03/01_main-chapter-code/ch03.ipynb b/ch03/01_main-chapter-code/ch03.ipynb
index 7e0fb31..06931e7 100644
--- a/ch03/01_main-chapter-code/ch03.ipynb
+++ b/ch03/01_main-chapter-code/ch03.ipynb
@@ -1485,7 +1485,8 @@
    "id": "5a575458-a6da-4e54-8688-83e155f2de06",
    "metadata": {},
    "source": [
-    "- If we apply a dropout rate of 0.5 (50%), the non-dropped values will be scaled accordingly by a factor of 1/0.5 = 2."
+    "- If we apply a dropout rate of 0.5 (50%), the non-dropped values will be scaled accordingly by a factor of 1/0.5 = 2\n",
+    "- The scaling is calculated by the formula 1 / (1 - `dropout_rate`)"
    ]
   },
   {