What is the tenacious badge?

Question

According to the description of the tenacious badge:

Zero score accepted answers: more than 5 and 20% of total.

"Zero score" make sense; the answer was accepted without an up vote.

But what does "more than 5 and 20% of total" mean?

Answer 1

It means you need to have six or more accepted zero score answers, and those must at least make up 20% of all your accepted answers to get the badge.

From the list of all badges and descriptions on MSO:

Tenacious

• silver; awarded once
• Have more than five accepted answers with a score of zero, and have those zero-score accepted answers account for at least 20% of all your accepted answers