diff --git a/jazzbtod.rb b/jazzbtod.rb
new file mode 100644
index 0000000..1e950de
--- /dev/null
+++ b/jazzbtod.rb
@@ -0,0 +1,9 @@
+def binary_to_decimal(binary_array)
+  # raise NotImplementedError
+  count = 8
+  new_array = []
+  binary_array.each do |index|
+    new_array << (2 ** (count -= 1)) * index
+  end
+  return new_array.sum
+end