About Permalink —> affected the source html code

Hello, maybe it’s a noob question, but I couldnt find it in support archives.

I tried to use permalink. So..

From https://www.example.com/?p=7
become –> https://www.example.com/archives/7

From https://www.example.com/?page_id=1
become –> https://www.example.com/post-slung

The problem is, in my themes, all html source for image src, link src, and also link to other link page is like this

example: <img src=”images/index-1.jpg”>
so by default, it means,
take image from https://www.example.com/images/index-1.jpg

By using permalink, it changed
it takes image from https://www.example.com/archives/7/images/index-1.jpg

Which is nothing in there..

Is there any way to set the default folder to root?
Or I have to write the full URL for every src=” thing?
(which that’s the last thing I wanna do)

Thx in advance =/