1. He is a friend of ____ A. my father's B. my father. Which is correct? Both OK?-- Both are OK, but the double-possessive is far the more common.
2, Seventy percent ____ well educated in this area. A. is B. are Which is correct? both OK?- Are. It depends on what the percentage is of: 10% of the people are; 10 % of the wine is.