Read this article to figure out how to calculate the lowest common denominator of . Learn the two different methods that you can use to find the LCD: the prime factorization method and the LCD formula method. We will explain both these methods in detail so stick around until the very end to understand. Utilise our free LCD Calculator to avail the LCD of numbers easily.
Given numbers are 643,558,790
We can find the LCD of numbers 643,558,790 by the prime factorization method or by applying the LCD formula.
The LCD of 643,558,790 is 141723630.
2 | 643, 558, 790 |
643, 279, 395 |
As you can see, now we have to multiply the prime numbers on the left side with the co-primes at the bottom.
2 x 643 x 279 x 395 = 141723630
Thus, we have determined that the LCD of 643,558,790 is 141723630
The LCD formula is LCD(a,b) = ( a x b) / GCF(a,b)
Step1:
Find the GCF of 643 and 558. To find the GCF, list down the factors of 643 and 558 and select the highest factor that appears in both lists of factors.
643 : [1, 643]
558 : [1, 2, 3, 6, 9, 18, 31, 62, 93, 186, 279, 558]
From this, we can see that the GCF of 643 and 558 is 1.
Now, put this into the LCD formula.
LCD(643, 558) = ( 643 x 558 ) / 1
LCD(643, 558) = 358794 / 1
LCD(643, 558) = 358794
Step2:
Find the GCF of 358794 and 790. To find the GCF, list down the factors of 358794 and 790 and select the highest factor that appears in both lists of factors.
358794 : [1, 2, 3, 6, 9, 18, 31, 62, 93, 186, 279, 558, 643, 1286, 1929, 3858, 5787, 11574, 19933, 39866, 59799, 119598, 179397, 358794]
790 : [1, 2, 5, 10, 79, 158, 395, 790]
From this, we can see that the GCF of 358794 and 790 is 2.
Now, put this into the LCD formula.
LCD(358794, 790) = ( 358794 x 790 ) / 2
LCD(358794, 790) = 283447260 / 2
LCD(358794, 790) = 141723630
LCD of 643,558,790 is 141723630
Here are some samples of LCD of Numbers calculations.
1. What is the LCD of ?
Answer: LCD of is .
2. How to find LCD of using prime factorization ?
Answer: Just keep dividing by prime numbers until only co-primes are left over. At that point, simply multiply the co-primes with the prime numbers on the left. The answer will be , the LCD.
3. How to Find the LCD of using LCD formula ?
Answer: The LCD formula is LCD(a,b) = ( a x b) / GCF(a,b).
You must first calculate the LCD OF and . Then, find the LCD of that answer and and so on. The answer will be , which is the LCD of .