> 90% of the problems with vintage motor scooters are either carburators or ignition.
> > Howard
>
> Now I have a problem with my grammar. Is it correct to say "90% are?" I think I was letting my verb agree with the object of a preposition. It could have been "problems" or "scooters," but the subject is "90%" which looks plural. I think it really is singular as in, "90% is a good commission."

Now, not being native American, I don't really have much saying in this matter, but to me, it would depend. I think you're right in both instances. If you put in pronouns instead, that would help you decide. Like this: "90% of the problems" would be "they are either...", but "a 90% commission" would be "that is a good..."

Trav"these are just my 2 cents"holt