Out of 30 kids that came to a Halloween party 4 wore Harry Potter costumes, 3 were dressed as Ron Weasley, and 5 were dressed as Hermione Granger. What percent of all kids at the party were dressed as Hogwarts students?

Answer 1

Add: 4 + 3 + 5 = ?
?/30 = (simplify that to lowest terms)
Answer: ?/5

Answer 2

That's wrong

Answer 3

How?

Answer 4

fraction = 12/30 = 2/5 or .4 or 40%

If "they" don't accept that answer, which Barry Vacker also had, then there is either
a misprint in the question, or an error in the answer key.