ASM traffic learning percentage meaning

Ppp2016,

This looks like it's a new feature in v12 and is about confidence ASM has in the learning suggestion. From the Guide it explains it better Refining Security Policies with Learning:

Next to each suggestion, ASM assigns a learning score that measures the strength of the suggestion by showing a percentage that indicates how close the system is to recommending that you accept the suggestion. The learning score is also influenced by the violation rating: the lower the rating of the violations, the higher the score.

If the system is working in automatic learning mode, when the learning score reaches 100%, the system accepts and enforces most of the suggestions, or you can accept suggestions manually at any time. If you are using manual learning, when the learning score reaches 100% (or before that if you know the suggestions are valid), you need to accept the suggestions manually.