Basically, what I want to ultimately do, for faster coding purposes, be able to do <img src="pic.jpg" width="50%" height="50%"> and move on, not have to tidiously use Windows Calculator, take 747 and divide it in half. All the pictures are too big, because I render them in Rhinoceros 3D in high quality. But I want them to appear on the site in half the size.
It was mainly for faster coding purposes. I wasn't sure that it could be done, this is why I asked. I have looked on line for it, but I see how it references to the size of the page. I would want it to take that pic's size and divide it in half so it is half the size of the original picture.
Just wasn't sure if I could do this... I'm willing to keep editing the test page to try and get it right.