diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..8bf4d45
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,6 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/binary-and-decimal.iml b/.idea/binary-and-decimal.iml
new file mode 100644
index 0000000..1d8df90
--- /dev/null
+++ b/.idea/binary-and-decimal.iml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="RUBY_MODULE" version="4">
+  <component name="ModuleRunConfigurationManager">
+    <shared />
+  </component>
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/features" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/spec" isTestSource="true" />
+      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="PROVIDED" name="ansi (v1.5.0, rbenv: 2.6.5) [gem]" level="application" />
+    <orderEntry type="library" scope="PROVIDED" name="builder (v3.2.4, rbenv: 2.6.5) [gem]" level="application" />
+    <orderEntry type="library" scope="PROVIDED" name="bundler (v2.1.4, rbenv: 2.6.5) [gem]" level="application" />
+    <orderEntry type="library" scope="PROVIDED" name="minitest (v5.14.1, rbenv: 2.6.5) [gem]" level="application" />
+    <orderEntry type="library" scope="PROVIDED" name="minitest-reporters (v1.4.2, rbenv: 2.6.5) [gem]" level="application" />
+    <orderEntry type="library" scope="PROVIDED" name="minitest-skip (v0.0.1, rbenv: 2.6.5) [gem]" level="application" />
+    <orderEntry type="library" scope="PROVIDED" name="rake (v13.0.1, rbenv: 2.6.5) [gem]" level="application" />
+    <orderEntry type="library" scope="PROVIDED" name="ruby-progressbar (v1.10.1, rbenv: 2.6.5) [gem]" level="application" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
new file mode 100644
index 0000000..b0db9b0
--- /dev/null
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="Rubocop" enabled="false" level="WARNING" enabled_by_default="false" />
+  </profile>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..510e7fc
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="rbenv: 2.6.5" project-jdk-type="RUBY_SDK" />
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..d7f43dc
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/binary-and-decimal.iml" filepath="$PROJECT_DIR$/.idea/binary-and-decimal.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/lib/binary_to_decimal.rb b/lib/binary_to_decimal.rb
index 439e8c6..f9064d6 100644
--- a/lib/binary_to_decimal.rb
+++ b/lib/binary_to_decimal.rb
@@ -5,5 +5,15 @@
 # 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
+  decimal_value = 0
+  exponent = 7
+
+  binary_array.length.times do |value|
+    decimal_value += binary_array[value] * 2 ** exponent
+    exponent += -1
+  end
+  return decimal_value
 end
+# decimal_value = ((binary_array[7]) * (2**0)) + ((binary_array[6]) * (2**1) +(binary_array[5]) * (2**2)) + ((binary_array[4]) * (2**3)) + ((binary_array[3]) * (2**4)) + ((binary_array[2]) * (2**5)) + ((binary_array[1]) * (2**6)) + ((binary_array[0]) * (2**7))
+#
+# return decimal_value
\ No newline at end of file