Which one of these two statements is correct?
60% of staff work or 60% of staff works
Which one of these two statements is correct?
60% of staff work or 60% of staff works
60% of the staff works is the correct sentence as staff is singular. If you had said 60% of the girls in college are Christian , then we would have used "ARE".
The verb is not affected by the percent but rather, and always, by the subject.
60% of the staff always works, and it will still be "works" even if you change 60% into 1%, hence citing the fact that laws of grammar are rarely broken.