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Andy has a collection of movie DVDS .in andys collection 3/5 of the DVDS are action and 1/4 of the DVDS are comedy. ANDY said that 4/9 of his collection is action or comedy .cythania said that andy made an error. explain wether andy is correct or incorrect and why

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swimgirl2353
Andy is incorrect because you can not add fractions together unless they have a common denominator
Cynthia is correct because you need to find the greatest common multiple before you add the fractions together. 3/5 = 12/20 and 1/4 is equal to 5/20. Hope this helps :)

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