Subjects can be a clause or a phrase which has both a subject and a verb in it. The example stated by you is similar to that.

Eighty percent of the antibiotics sold in the united states - this is a clause which has a subject (Eighty percent of the antibiotics) and a verb (sold) in it. Together they make a subject clause and it always uses a singular verb. Hence 'goes' is right here.

Thanks for responding Sam...even I have heard that 'subject clause generally take singular verbs'. However I am not entirely sure about the application of the rule..

But I still don't believe that the original sentence sentence would use the singular 'goes'. Here is why:

Consider the following sentence: ten percent of the children living in the united states is or are obese.

What will you chose in the above sentence is or are?

The same logic makes me believe that the original sentence should take the plural go. I think we should wait for an expert to clear the air..

10% of the children - plural
10% of water - singular
10% of food - singular
10% of measles - singular

10% of antibiotics - singular

you can't count antibiotics, you can't say 1 antibiotic, 2 antibiotic,...

confuse mind wrote:10% of the children - plural
10% of water - singular
10% of food - singular
10% of measles - singular

10% of antibiotics - singular

you can't count antibiotics, you can't say 1 antibiotic, 2 antibiotic,...

Most antibiotics are not good for health.

I would for sure use an are, not an is in the above sentence.

khandelwal.ab wrote:Thanks for responding Sam...even I have heard that 'subject clause generally take singular verbs'. However I am not entirely sure about the application of the rule..

But I still don't believe that the original sentence sentence would use the singular 'goes'. Here is why:

Consider the following sentence: ten percent of the children living in the united states is or are obese.

What will you chose in the above sentence is or are?

The same logic makes me believe that the original sentence should take the plural go. I think we should wait for an expert to clear the air..

Ten percent of the children living in the united stated are obese would be my answer to your question.

Two reasons why the sentence feels right to me.

1. When it comes to usage of numbers the subject is what follows after the prepositional phrase based on this rule available from MGMAT. The rule is applicable to our example as the sentence uses percents.

In many idiomatic expressions that designate qyantities or parts such as a number of, the subject of the sentence is in an Of prepositional phrase. These expressions provide the exception to the rule that the subject cannot be in a prepositional phrase. We have seen the SANAM pronouns as examples of this phenomenon. Other examples include fractions and percents.

2. Antibiotics seems to be one of the collective nouns which can take both singular and plural form [I am not very sure about this, but it seems so] Maybe an expert can confirm this. Fish, hay are some of the collective nouns which are both singular and plural.

These are completely my opinions and my attempts to know what makes this sentence right. But I would suggest you to refrain from non GMAT materials for sentence correction problems. The time spent on analyzing this problem, which we are not sure whether it is right or not, can be spent on one official problem and learn something useful.