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Q: What is the common denominator of 15 and 20?

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The denominators of 20 and 15 are both 1, therefore, the lowest common denominator is 1.

300

LCD(8, 20, 15) = 120

The is no "largest" common denominator. For any denominator you find, we can multiply it by a natural number and come up with a larger one. Do you mean LEAST COMMON DENOMINATOR?

A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.

Related questions

The denominators of 20 and 15 are both 1, therefore, the lowest common denominator is 1.

The least common denominator (LCD) is 1.

20, although if you reduced 15/20 to 3/4, the common denominator would be 4.

300

60

LCD(8, 20, 15) = 120

The is no "largest" common denominator. For any denominator you find, we can multiply it by a natural number and come up with a larger one. Do you mean LEAST COMMON DENOMINATOR?

180

60

The lowest common denominator of any set of whole numbers is 1

A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.

The common denominator of 15 and 9 is 45.