Add/Subtract Quiz Totals on Results Slide

You should create a custom number variable (e.g., ScorePoints). On the Results slide, create a trigger that sets the ScorePoints variable equal to the QuizX.ScorePoints variable when the timeline starts on the slide. Then add another trigger that subtracts the Counter variable from ScorePoints when the timeline starts on this slide. Make sure these two triggers execute in the correct order (top to bottom), so the subtraction occurs after the value is copied from QuizX.ScorePoints.

Finally, reference the custom ScorePoints variable instead of the default QuizX.ScorePoints variable when displaying the final result to ensure the correct score is shown.

Keep in mind that the default QuizX.ScorePoints variable will still be reported to the LMS if quiz reporting is enabled. If you are not reporting the score to an LMS, you can fully customize the interaction without relying on the default score variables.

See the attached example.