Well, 11 + 7 = 18. 18/15 = 1 and 3/15 = 1 and 1/5.
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Five fifteenths, or 5/15, plus six fifteenths, or 6/15, is equal to eleven fifteenths, or 11/15.
7/9 > 11/15
One-third is the same as five-fifteenths. Two-fifths is the same as six-fifteenths. Five-fifteenths plus six-fifteenths is eleven-fifteenths. One, or fifteen-fifteenths, minus eleven-fifteenths is four-fifteenths.
seven fifteenths
three fifteenths