How do I reach 100% in every module?

The percentage displayed below the modules (Discovery, Intermediate, Advanced and Expert) corresponds to your completion rate.
To complete 100% of the module, you must earn 3 points for each exercise in the module.

To do this, you must answer each exercise question correctly and as quickly as possible.
If you think you have completed the module, but you're still not at 100%, you'll have to replay any exercises in which you did not earn the 3 points.