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The lowest common denominator (LCD) is also known as the least common multiple (LCM).
The simple way to find the LCD of 2 numbers is to make a list of the multiples of each number until you find a number which is in both lists. For example, find the LCD of 12 and 28:
12, 24, 36, 48, 60, 72, 84, ...
28, 56, 84, ...
The LCD is 84.
Sometimes you have to make long lists, and this method gets tedious.
The more technical method is to find the prime factorization of each number.
12 = 2x2x3
28 = 2x2x7
Notice that both numbers have 2x2, but we need a 3 to get a multiple of 12, and a 7 to get a multiple of 28. So you need 2 2's, a 3 and a 7:
The LCD is 2x2x3x7 = 84.
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What is the common denominator of fraction 4 5th?
You need at least two fractions to calculate a common denominator.
What is the least common denominator of 12 and 5?
The least common denominator is 60.
How is the least common denominator different from least common multiple?
a least common (LCD) denominator is a least common multiple (LCM); only it's a fraction and it's LCM is in the denominator's place.
What is a common denominator between 4 and 10?
A common denominator, though not the least, is 40.
What is the least common denominator of 57 and 35?
The Least Common Denominator of 57 and 35 is 1.
What is the common denominator of fraction 4 5th?
You need at least two fractions to calculate a common denominator.
What is the least common multiple of two ir more denominators?
That's the least common denominator or LCD.
What are the least common multiple of a denominator called?
The least common denominator.
What is the LCM of the denominators of two or more fractions?
The least common multiple of two or more denominators is known as the least common denominator, or LCD.
What is the least common denominator of two fractions?
The least common denominator is the least common multiple of the denominators of the fractions.
What is the least common denominator of 42 and 58?
The least common denominator is 1. The greatest common denominator is 2. The least common multiple is 1,218.
What is the least common denominator for12and15?
The least common denominator (LCD) is 1.
What is the least common denominator of 3 and x?
The least common denominator is 3x.
What is the least common denominator of 12 and 5?
The least common denominator is 60.
How is the least common denominator different from least common multiple?
a least common (LCD) denominator is a least common multiple (LCM); only it's a fraction and it's LCM is in the denominator's place.
What is the least common denominator of 743?
A common denominator needs at least two figures; that's why it's called a 'common' denominator.
What is a common denominator between 4 and 10?
A common denominator, though not the least, is 40.
