Question

Find the least common denominator (LCD) for the fractions. 1/12 and 3/4                                    A. 12        B. 4                                                   C. 16                                                   D. 48

Answer 1

1/12
Multiples of 12: 12, 24, 36, 48, 60...

3/4
Multiples of 4: 4, 8, 12, 16, 20, ...

12 is a multiple of both 12 and 4, therefore that will be the LCD.

Answer 2

'12' and '48' (choices 'A' and 'D') will both work as common denominators.

The least one is '12' .

Since 4 is a factor of 12, any multiple of 12 is also a multiple of 4 , and can
serve as a common denominator.  The smallest multiple of 12 is 12 itself.