Okay i worked it out!
Just go to dashboard/appearances/editor and in your editor where you will probably have your child theme css file stored, simply cut and paste the following code beneathe the child theme style.css file code or whatever you have in your editor file, perhaps it will just be blank if you have no child theme (worked for me but i’m a beginner):
#logo img {
max-width: 960px;
width: 100%;
}
