The LCD of 3/20 and 7/30 is 60.
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A common denominator, though not the least, is 30.
LCD(30, 45) = 90
The least common multiple of 20 , 25 , 30 = 300
The common denominator for 3 and 10 is 30. In order to find a common denominator, you need to identify the least common multiple (LCM) of the denominators. In this case, the LCM of 3 and 10 is 30, as it is the smallest number that both 3 and 10 divide into evenly.
the least common denominator of three fifths and two fifteenths and one sixth is 30. you multiply 15 by two, 6 by five, and 3 by ten.