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The least common denominator (LCD) is 630.
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions.
what is a common denominator for 6, 9 and 3
The least common denominator (LCD) of 3 and 9 is the smallest multiple that both numbers share. In this case, the LCD of 3 and 9 is the smallest number that is divisible by both 3 and 9, which is 9. This is because 9 is the smallest multiple of 3 and 9 that they both have in common, making it the least common denominator for these two numbers.
360