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Find the lowest common denominator of two fractions

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Question 1

What is the lowest common denominator of 16 and 18?

What is the lowest common denominator of 1/6 and 1/8?
Question 2

What is the lowest common denominator of 15 and 110?

What is the lowest common denominator of 1/5 and 1/10?
Question 3

What is the lowest common denominator of 16 and 112?

What is the lowest common denominator of 1/6 and 1/12?

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