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.
Therefore, Steven finished more homework.