Comparing fractions with common denominators

Example:: Steven and john talk the same class, Steven finished 11/15 homework, John finished 9/15 homework. Who finished more homework?

Solution:: When fractions have a common denominator, compare the numerators.; Both fractions 11/15 and 9/15 have the same denominator 15,; the numerator of the first fraction 11/15 is 11,; The numerator of the second fraction 9/15 is 9,; since 11 > 9, that is, the numerator of the first fraction > the numerator of the second fraction; so 11/15 > 9/15, that is, the first fraction > the second fraction.