Click on the down arrow next to your name on the top right of any page, then click on Courses. Alternatively, you can also click on the Learn button on the left side panel to see your courses as well.
You’ll see the percent of completion under each of your courses. If you completed a course entirely, the percent shown under the progress bar will be 100% and the course will show a Completed sign. If you’re still in progress, you’ll be able to see what percent of the course you finished so far.