The first number is the total score on just the non-wiki answers you've given. This number is relevant because it is what is used to determine when you have earned a tag badge. Note that this number is the total score, not the total amount of Rep you earned. If you had 4 upvotes and a downvote on an answer, it would contribute 3 to your total score, but 38 to your total Rep.
The second number is the total number of posts you've made (questions and answers, wiki and non-wiki) that involved that tag. You appear to have no wiki posts, since 12 questions + 101 answers = 113 posts. I, for example, currently have 937 posts for the matlab tag, and my hover text tells me I have 1 non-wiki question and 933 non-wiki answers. The three missing wiki answers can be seen here.