Is Wikipedia wrong?

It's wrong. You could say: "Rh negative blood types are (proportionally) much less common in Asian populations (0.3%) than they are in White (15%)."

The word "proportionally" is optional. Even if omitted, we gather from the general context and from the statement of percentages that proportions rather than absolute numbers are being considered.

I came across an ad in the paper, the ad I translated at the very bottom. I looked into marriage on wiki and I wanted to know if the bold has any errors. Some don't read well. GPY, could you tell me what you think?

A sham marriage or fake marriage is a http://en.wikipedia.org/wiki/Marriage_of_con

Most of that Wikipedia text is fine. Some small comments: (i) There are some errors in spacing that seem to be just a copy-paste glitch. (ii) I would prefer "for reasons other than those of relationship, family, or love". (iii) I question whether "political marriage" can logically be a purpose of marriage. (iv) "a peer group, observers or individual exerts" isn't quite right in terms

I came across an ad in the paper, the ad I translated at the very bottom. I looked into marriage on wiki and I wanted to know if the bold has any errors. Some don't read well. GPY, could you tell me what you think?
Here is what I thought in red. Can you tell me if the red is correct and better or not please?
A sham marriage or fake marriage is a

A sham marriage or fake marriage is a http://en.wikipedia.org/wiki/Marriage_of_convenience entered in into with the intent of deceiving public officials or society about its purpose.
"entered into" is correct. "ente

Thanks
Since we are talking about a behaviour, would it be possible to use 'with regard to' or 'in relation to'
They may also recognize dissociative groups with which they would not wish to associate, and thus they behave adversely with regard/to/in relation to concerning

Since we are talking about a behaviour, would it be possible to use 'with regard to' or 'in relation to' They may also recognize dissociative groups with which they would not wish to associate, and thus they behave adversely with regard/to/in relation to concerning that group's

Thanks for your correction.

I had seen a sentence with with regard with, Could you tell me what you think?
If you are wondering, this was said during a basketball game:
Every statistical feature says they are better with him on the floor even though he's a liability with regard to his shooting. She shoots the ball poorly.

I was reading an article on Wiki, that is interest

AnonymousEvery statistical feature says they are better with him on the floor even though he's a liability with regard to his shooting. She shoots the ball poorly.

I find it tolerable, but I would prefer to say "he's a liablility as far as his shooting is concerned" (or you could simply say "his shooting is a liability"). I feel that "statistic" would do

Thanks for your correction.

I had seen a sentence with with regard with, Could you tell me what you think?
If you are wondering, this was said during a basketball game:
Every statistical feature says they are better with him on the floor even though he's a liability with regard to his shooting. She shoots the ball poorly.

I was reading an article on Wiki, that is interest