Bullet formed questions with % score at final screen
I'm trying to create a simple questionnaire Exam for a mobile device.
The Mockup would display a question per screen for the user to answer. Once the user clicks on one of the radio button answers, a new screen is displayed with a new question and new answers. The users will go through a series of questions/answers until the last screen will display the final results of the Exam. The final screen will display the % score.
What would be the best way to store the user selections (via bullets) then callback on the final page for calculating the percentage score?
Here is an example Question & Answer User screen: