SQLのAVG関数の小数点以下の桁数を2に制限するにはどうすればよいですか？

SELECT grade.GStudNo, ROUND( AVG(grade.Grade),2 ) AS Average, students.LName, students.FName, students.MName, students.Course
FROM students INNER JOIN grade ON students.StudNo = grade.GStudNo
WHERE GSem = '$sem' AND GYear = '$year'
GROUP BY grade.GStudNo
ORDER BY Average ASC LIMIT 3

2か所に丸めます。