Your current skill level is indicated by a skill scorecard. 

The stars and the % number indicate the estimated current performance level, based on the predicted probability of correct pronunciation of that skill.  The current performance number changes constantly as skills are acquired and as exercises become more difficult.  See also How-is-performance-measured

Your current skill level is indicated by a system of stars indicating the level of proficiency for each skills category.

• One start shows a proficiency level from 0% to 25%
• Two stars shows a proficiency level from 26% to 50%
• Three stars shows a proficiency level from 51% to 80%
• Four stars shows a proficiency leve that is above 80%

You will gain stars as your skill levels increase!