diff --git a/ProgrammingAssignment_1/ProgrammingAssignment1.ipynb b/ProgrammingAssignment_1/ProgrammingAssignment1.ipynb
index 4b938bcb4b10313af3980cf72deccadc5a77ab1a..d101f79d9d21ba7928872d987c305657e16a2b54 100644
--- a/ProgrammingAssignment_1/ProgrammingAssignment1.ipynb
+++ b/ProgrammingAssignment_1/ProgrammingAssignment1.ipynb
@@ -284,7 +284,6 @@
    "source": [
     "# TODO\n",
     "\n",
-    "\n",
     "# get model predictions\n",
     "pred_ratios = my_model.predict(my_model.features[my_model.test_indices])\n",
     "\n",
diff --git a/ProgrammingAssignment_1/ProgrammingAssignment1_solution.ipynb b/ProgrammingAssignment_1/ProgrammingAssignment1_solution.ipynb
index 72f08c43840d1bd34ff323f25718b5fc362da6a6..02836abc7439434a0ad104ce1a853d8366e9a243 100644
--- a/ProgrammingAssignment_1/ProgrammingAssignment1_solution.ipynb
+++ b/ProgrammingAssignment_1/ProgrammingAssignment1_solution.ipynb
@@ -389,7 +389,7 @@
     }
    ],
    "source": [
-    "# try sizes 50, 100, 150, 200, ..., up to the largest multiple of 50 >= train_size\n",
+    "# train using %10, %20, %30, ..., 100% of training data\n",
     "training_proportions = np.arange(0.10, 1.01, 0.10)\n",
     "\n",
     "# TODO\n",