diff --git a/lib/binary_to_decimal.rb b/lib/binary_to_decimal.rb
index 439e8c6..ed21364 100644
--- a/lib/binary_to_decimal.rb
+++ b/lib/binary_to_decimal.rb
@@ -4,6 +4,43 @@
 # The least significant bit is at index 7.
 # Calculate  and return the decimal value for this binary number using
 # the algorithm you devised in class.
+
 def binary_to_decimal(binary_array)
-  raise NotImplementedError
+
+  n = 0
+  expected_decimal = 0
+
+  expected_decimal += binary_array[7].to_i * (2**(n))
+  puts expected_decimal
+  n += 1
+
+  expected_decimal += binary_array[6].to_i * (2**(n))
+  puts expected_decimal
+  n += 1
+
+  expected_decimal += binary_array[5].to_i * (2**(n))
+  puts expected_decimal
+  n += 1
+
+  expected_decimal += binary_array[4].to_i * (2**(n))
+  puts expected_decimal
+  n += 1
+
+  expected_decimal += binary_array[3].to_i * (2**(n))
+  puts expected_decimal
+  n += 1
+
+  expected_decimal += binary_array[2].to_i * (2**(n))
+  puts expected_decimal
+  n += 1
+
+  expected_decimal += binary_array[1].to_i * (2**(n))
+  puts expected_decimal
+  n += 1
+
+  expected_decimal += binary_array[0].to_i * (2**(n))
+
+  return expected_decimal
 end
+
+# raise NotImplementedError