Do not need a explanation but would be nice!

Ineed asap.i cant understand this question i need someone to me right away

Which number completes the inequality? 2/3 < _ < 7/9

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.