standard_description: Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)
problem_activity: Lola made lasagna for a church potluck. Below represents how much of the two pans of lasagna were eaten.
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Lola says
$$3\over 4$$
of the lasagna was eaten. Milton, Lola’s brother, says
$$6\over 4$$
of the lasagna was eaten. Who is correct? Explain your answer.


aligns: no