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

'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.

1/12Multiples of 12: 12, 24, 36, 48, 60...3/4Multiples of 4: 4, 8, 12, 16, 20, ...12 is a multiple of both 12 and 4, therefore that will be the LCD.