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If I wanted to be nasty about it, I would say 1, because the least common denominator of 45/1 and 75/1 is 1. The least common denominator of two fractions is the least common multiple of their denominators. I presume you are asking for the least common multiple of 45 and 75, which is 225.

Q: What is the lowest common denominator of 45 and 75?

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9 over 15. You divide them both by a common denominator in this case 5.

A common denominator is 75.

45 over 75 in lowest terms is 3/5

LCD(75, 275) = 825

The common denominator of any two or more whole numbers will always be 1.

Related questions

There is no greatest common multiple, as the multiples are infinite. Their greatest common denominator is 15. Their lowest common multiple is 7650.

9 over 15. You divide them both by a common denominator in this case 5.

525

3000

The greatest common denominator, like the greatest common multiple, is infinite.

A common denominator is 75.

45 over 75 in lowest terms is 3/5

There is no such thing as a most common denominator.

A common denominator, though not the least, is 7500.

It is any multiple of 75.

It is 75.

the lowest common denominator is 75 13/15 = 65/75 22/25 = 66/75 so 22/25 is bigger