10
10/14=5/7
19/14 as an improper fraction 15/14 as a mixed fraction
LCD(5, 14) = 70
LCD is y E
(3/14) - (1/28) = (6/28) - (1/28) = 5/28
14
The least common denominator is 14. Whenever there are two values, and one is a multiple of the other, the multiple (larger number) is the LCD.
1/2
As 14 and 5 have no common factor other than 1, lcd of 14 and 5 is 14 × 5 = 70.
The LCD of 13, 14 and 15 is 2730 The LCD of 1/3, 1/4 and 1/5 is 60
LCD(21, 13, 14, 15) = 2730