'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.
1/12 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.
The least common denominator (LCD) for the fractions 12 1 and 4 3 is 12. This is found by identifying the smallest common multiple of the denominators, which are 12 and 4. Therefore, the correct answer is A. 12.
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