The concept of Panda and Penguin update is not to have an exact number of links (Anchors).
Panda and Penguin were released for only one purpose to kill the spam websites with low value of content and low value of links.
Okay, so where is the trick now?
- Panda (Content)
Panda is all about content - How you optimize your content, how you put your links within your site, how you socialize your site with social-networking sites:
1.Do not use your keyword a lot on your content.
2.Do not use the same keyword on your tag or keyword section
3.Social Networking site or so called social signals (Likes,Shares,Google +, Tweets)
These are the most important factors when it comes to the On-Page optimization.
2. Penguin (Link-Building) - How to create quality backlinks, how to avoid spam links, how to be more natural in link building:
Backlinks are the main factors that give points to the search engines - Sites with the most points are ranked higher.
So in the Penguin update, Google has been taking care of spam links. Nowadays you should build natural links like :
In-Content Links, Co-Citation Links, Forum Links, Blog comments (All of these links should come from sites that have authority in the Search Engines).
Some type of links work 100x times better than some of other types, you should find which one work the best.
So it is not how much in percentage you optimize your anchor, it is all how you do SEO without using anchors.
Remember, anchor texts nowadays should be used only in-content links (Blog Posts,Article Directories... Etc.)
Hope i could help you.