A box contains 60 apples. If one-fifth of the apples are rotten, what percent of the apples are rotten? (1 point)

One-fifth of 60 is (1/5)*60 = <<(1/5)*60=12>>12 apples.

Therefore, 12/60 * 100% = <<(12/60)*100=20>>20% of the apples are rotten. Answer: \boxed{20}.