28
To subtract one-fourth from three-sevenths, you need a common denominator. The least common denominator between 7 and 4 is 28. Converting the fractions, three-sevenths becomes 12/28 and one-fourth becomes 7/28. Subtracting these gives 12/28 - 7/28 = 5/28. Thus, three-sevenths minus one-fourth equals 5/28.
21
The least common denominator of five sixths and one fourth is: 12.
Fourteenths (eight and seven)
The LCD of 2/7 and 4/5 is 35.
20
8
one twelfth
That's the least common denominator or LCD.
The least common denominator.
4/7 and 3/5 have an LCD of 35 since they 7 and 5 have no common factors.
To find the least common denominator of 1/3 and 1/4, we need to determine the smallest multiple that both denominators (3 and 4) have in common. The least common denominator is the least common multiple (LCM) of the denominators. The LCM of 3 and 4 is 12, so the least common denominator of 1/3 and 1/4 is 12.