diff --git a/lib/binary_to_decimal.rb b/lib/binary_to_decimal.rb
index 439e8c6..97dd48e 100644
--- a/lib/binary_to_decimal.rb
+++ b/lib/binary_to_decimal.rb
@@ -1,9 +1,11 @@
-# A method named `binary_to_decimal` that receives as input an array of size 8.
-# The array is randomly filled with 0’s and 1’s.
-# The most significant bit is at index 0.
-# 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
-end
+  sum = 0
+  decimal_array =  [128, 64, 32, 16, 8, 4, 2, 1]
+  binary_array.each_with_index do |number, index|
+    if number == 1
+      sum += decimal_array[index] 
+    end 
+  end
+  return sum
+end
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