I've build my own template so when someone creats an article the image on the top ( like an intro image ) has a width of 100% and his own height ( could be 200px or whatever ). Now someone decided to create an new article and put more then just one picture in the article with their own width, position etc. But because of my intro image they've all a width of 100%.

My first thought were, that I create a module for these pictures but I can't always create an article for someone and put always a module around it because he wants his picture for example on the left with 29,97% width ( or 65% it doesn't matter ).

Does anyone know a solution for this?

I appreciate every help and comment!

EDIT: Thank you all for helping me! Unfortunately I can just accept one answer and this went to @FFrewin because he listed a few more ways to handle this problem but the other answers helped me out too!