Hi Mahesh,
I found a code after having submittend the question to you and adapted it, and it seems to work:
#primary {
width: calc(68% – 10px); }
#secondary {
width: calc(32% – 10px); }
In this way I can easily change the proportion of primary vs. secondary part of the website.
What do you think, is that ok in this way? Any side-effects not forseen?
Kind regards
Franz