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
Oh honey, the least common denominator of 3 and 9 is 9. It's like finding the least annoying song on a playlist full of earworms - not too difficult. Just multiply those numbers together and boom, you've got your LCD.
360
36
18
18
126
18
36
It is 630
126
180
The least common denominator for 9 and 10 is 90.
18 3*6 = 18 2*9 = 18
LCD(11, 9, 6) = 198