Adjusting the CSS for a sidebar in a responsive website so it is not so wide. Leaving more room for the main page content.

Hello CSS Experts.

I have a web page that has a left sidebar that is "too wide".   It takes up too much horizontal real estate on the page.

Here's the page  Website link

I need the left side bar to be "narrower""  (looking at the source HTML and  css it appears to be 25%)  And the content to the right of it to be able to take up the rest of the  newly available real estate/  ( looking at the source html and css it appears to be "three-quarters".)

Since this site uses some kind of a grid, I need to do this correctly, which is why I am asking the question here.  

For example, I'd like the left sidebar to be about 15 percent  and right "content"side to be 85 percent -- making it all 100 percent.
page-margin grid collection-sidebar
All of the above appears to be controlled by a class called "page-margin grid collection-sidebar:   But I am not 100 percent certain.  

Needless to say I only  want the content in the page-margin grid collection-sidebar affected by this change  I don't want to change any overall grid settings that might be used elsewhere on the site.

Thanks for any help!

Rowby GorenAsked:
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Paul MacDonaldDirector, Information SystemsCommented:
Link doesn't work when I test it.
Rowby GorenAuthor Commented:
Sorry. Paul

Use this link instead  Better link
Paul MacDonaldDirector, Information SystemsCommented:
The 15% / 85% thing seems to work okay.

A way to handle this would be to copy the .large---one-quarter and .large---three-quarters classes.  Rename the copies as something else (large---one-seventh, large---six-sevenths, etc) and modify those classes for 15% and 85%.  Then, replace the one-quarter and three-quarters classes with the new ones.  This will leave the old classes available for other pages where they're appropriate, but let you change the page you're working on.
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Rowby GorenAuthor Commented:
Hi Paul,

That makes sense and I see what you are talking about,

I will be working on this on Friday and get back here with the .results


Julian HansenCommented:
You already have classes

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Defined in your stylesheet (but no sevenths) I would use what you have already got

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Rowby GorenAuthor Commented:
Hi Julian.   I’ll see if I can try that.  

Sounds good.

Rowby GorenAuthor Commented:
I must say this modified awards interface is not very good
"I have my answer" should be "Award points".   "I have my answer" looked to me like I have my own answer.   I hope someone can fix this.

Also I wanted to award some point to Paul but couldn't find a way to do that.  I prefer the old method of awarding points.

Thanks!  I  used Julian's answer, but Pau's answer was also helpful.
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