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21

As 3 and 7 are relatively prime (their hcf = 1), their lcm is 3Ã—7 = 21.

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The lowest common denominator in this case would be 1.

Q: What is the least common denominator of 7 and 3?

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There is none. A least common denominator is to be found between or among fractions. 3 and 7 are not fractions.

84/14 = 6 84/7 = 12 84/3 = 28 Hence 84 is the least common denominator

It is: 42

105

40

Related questions

The Least Common Denominator of 3/4 and 7/8 is 8.

There is none. A least common denominator is to be found between or among fractions. 3 and 7 are not fractions.

84/14 = 6 84/7 = 12 84/3 = 28 Hence 84 is the least common denominator

1

21

105

It is: 42

The least common denominator is 28.

Least common denominator of 7 and 5 is 35.

It is: 84

42

40