What does "Overall Practice Question Accuracy" refer to?

Students will notice a field called “Overall Practice Question Accuracy” in their tutorial results table on the myLearning page, and instructors will see this field in their course results table on the myTeaching page. This field presents the user’s overall accuracy on their first answers on the multiple-choice and fill-in-the-blank practice questions presented during the tutorial’s lessons. Note that it includes only the user’s first attempt at the practice question, and does not include any additional attempts at the question the user may have made. This score is completely separate from the quiz scores presented in the results table.