What is the LCD of these
1/30, 1/18
To find the Least Common Denominator (LCD) of 1/30 and 1/18, we must find the smallest multiple that both denominators, 30 and 18, share.
First, let's list the multiples of both numbers.
Multiples of 30: 30, 60, 90, 120, 150, ...
Multiples of 18: 18, 36, 54, 72, 90, ...
From the lists, we can see that the smallest multiple shared by both denominators is 90.
Therefore, the LCD of 1/30 and 1/18 is 90.