Watching another SE era news report (TWC327) and this one has the following:

CNN Newsource 1/30/97 3AM - 23 Entertainment: Star Wars Returns - Dennis Michael PKG 2:21

Dennis Michael: Lucasfilm and 20th Century Fox teamed up to give the film something of a tune up, ended up giving it a complete overhaul.

George Lucas: When I went in, I was just going to change four or five shots. And as it's turned out now, I think there are now over 700 pieces of new negative in the film out of about twelve hundred, it's almost, it's more then half the film. But a lot of them are simply just redoing wipes and fades and flopped shots, things people won't notice, to make them cleaner.

*OMIT*

GL continues: There are over 110 ILM shots that are new.

There's an interesting look/giggle in the negative sentence. Not sure how to take his overall number.