I think it is for about 40 percent.
What Percentage Of DNA Of Laboratory Animals Is Shared With Humans?
It depends upon which animal species you refer to as they are all different.
Depends on the lab animal. In the case of primates the similarities can get into the 90+% range. Even mice are 80+% the same. Here is a 2002 article about the sequencing of the mouse genome: www.sfgate.com