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You must find the lowest common denominator, which is 30 .

6/30 + 20/30 = 26/30 which, when reduced, equals 13/15

or you could reduce 4/6 to 2/3 before adding, so that you have 1/5 + 2/3, then the LCD would be 15.

3/15 + 10/15= 13/15

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14y ago

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