What are his chances of survival?

My grandfather was recently diagnosed with colon and liver cancer. He's 79 years old. He had a surgery to remove the part of his colon that had the cancer, but apparently 95 percent of his liver has cancer. What are his chances of beating this?
Updates
+1 y
I'm EXTREMELY glad to report that we got some good news last week :) He went to the oncologist and apparently its only 20 percent of his liver with cancer. Whichever dumb ass told him differently sucks! Haha thank you all for the advice, and if you could respond to the update I'd greatly appreciate it :)
What are his chances of survival?
Post Opinion