Fix math and dropped

Author: saurabh3949

introduction_to_amazon_algorithms/blazingtext_word2vec_subwords_text8/blazingtext_word2vec_subwords_text8.ipynb

@@ -424,6 +424,7 @@
    "outputs": [],
    "source": [
     "import numpy as np\n",
+    "import math\n",
     "from scipy import stats\n",
     "\n",
     "batch_size = 500\n",
@@ -485,7 +486,7 @@
     "fin.close()\n",
     "\n",
     "corr = stats.spearmanr(mysim, gold)\n",
-    "print(\"Correlation: %s, Dropped words: %s%%\" % (corr[0] * 100, math.ceil(drop / nwords * 100.0)))\n"
+    "print(\"Correlation: %s, Dropped words: %s%%\" % (corr[0] * 100, math.ceil(dropped / nwords * 100.0)))\n"
    ]
   },
   {