When you export test scores into your gradebook, you have the option to export the raw points (scores) or the percentage score. See this previous article on how to export the raw scores to your gradebook.
Depending on your gradebook, you may want to export scores as percentages instead of raw scores. To export percentages, simply change the export to gradebook setting in Naiku. Click on your name at the top of the page to get to your user profile setting. At the bottom of your user profile pages, you'll see your Gradebook Export Settings.
Check the box to "Export score as percentage rather than points". Click on "Update my profile" to save your setting.
When you go back to the Class Result report, simply use your function key to transfer scores to your gradebook as you've done before. Now, you'll see that the percentages rather than the raw points are transferred into your gradebook.