Step 1: Log into your Drupal admin interface.
Step 2: Once inside the admin interface, look to the options on the top menu bar and click on ‘Reports’.
Step 3: Now that you are on the Reports page, locate and click on the Status report link.
Step 4: After clicking on the Status report link, you will see a screen with various configuration settings. The topmost setting is labeled Drupal and has the version number to the right.
Click here to view this article as Oryon knowledge base video tutorial playlist.