For homework, a student had to complete 15 problems total. If she finished 6 problems in class, what is the ratio of problems she still needs to complete to problems that she already finished?

Answer 1

If she already finished 6, then 15-6=9 problems remain. The ratio would be (problems remaining):(problems finished) or 9:6, which simplifies to 3:2 or, in fractional terms 3/2.