Artistic work can be copied under the "fair dealing" provisions of the Copyright Act, without obtaining the copyright owner's permission, so long as the copying is for the purposes of "research or study" or "criticism or review.
"Artistic work" for copyright purposes includes paintings, sculpture, cartoons, photographs, illustrations, etc. It does NOT include moving images or animations - these would normally be defined as films (see separate section on copying 'Sound recordings and film/video clips').
The artistic work can be copied in its entirety - it is not necessary to limit yourself to 10% of it. To be fair, you should normally limit yourself to a single copy unless multiple copies are required for purposes of criticism or review.
For more information please see the following Australian Copyright Council Information sheets: