No CTD it is not common knowledge. Your assumptions regarding "harmful" and "beneficial" mutations have a few problems.
1. The words can be and are ambiguous without context or definition.
2. You totally ignore neutral mutations.
3. You claim a ratio that you are not supporting from any scientific journals, papers or books. The Google results you provided only supplied either creationist sites that make the same claim as you or sites that are rebutting those creationist sites.

Is your lack of knowledge in this area so great that you must bluster and distract rather than answer a few simple questions?

I guess your version of evolution suffered a "harmful" mutation during its conception and is now made of straw.