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Q: How do you do least common denominator of 2 and 7?

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The least common denominator (LCD) is 630.

The numbers 7, 3, and 2 share no common denominator. They are prime numbers.

The least common denominator of 2, 5 and 7 is 70. Since all those numbers are prime, the answer is their product.

154

42

70

70

Least common denominator of 7 and 5 is 35.

There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions.

The Least Common Denominator of 5, 7, and 35 is 1.

7

It is: 84

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