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how does Guil know the values of the percentages?
Where is he getting the values for percentages?
Andrew Dunn14,718 Points
I did a quick Google search because I keep forgetting the answer to this (my brain doesn't like absolute percentages with decimal points at the end :P ) - the first result, go figure, was an old Treehouse video featuring the lovely Allison Grayce: http://teamtreehouse.com/library/build-a-responsive-website/creating-a-fluid-foundation/converting-pixels-to-percentages-2
Basically, it's the target divided by context equals the result...
So if your column is optimally 300 pixels wide (for whatever reason) and its container is 1000 pixels wide, your column would have a width of 30%.
Hope this helps!