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14 February, 03:55

What is the least common denominator of 2/7 and 5/4

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  1. 14 February, 05:27
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    28 is the LCD. You can always get a common denominator by dividing the numbers 7 x 4 = 28.

    To find the LCD I look at the multiples of the larger number (since there will be fewer of them) As I do this I check to see if the other number is a factor of it

    7 (4 isn't a factor), 14 (4 isn't a factor), 21 (4 isn't a factor), 28 (4 IS a factor) !
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