There's a lot of possible variety in the answer, but generally the settings show in the below screenshot should do what you need.
Be sure you have the latest version of CP6 (6.0.1.240).
The user will have to reach the END of every slide for it to be considered 'complete'. If there are long slides where that may not happen, you might want to either shorten the slides and/or make the percentage more like 90% or 95%.
