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 642,845,169
We can find the LCD of numbers 642,845,169 by the prime factorization method or by applying the LCD formula.
The LCD of 642,845,169 is 542490.
13 | 642, 845, 169 |
13 | 642, 65, 13 |
642, 5, 1 |
As you can see, now we have to multiply the prime numbers on the left side with the co-primes at the bottom.
13 x 13 x 642 x 5 x 1 = 542490
Thus, we have determined that the LCD of 642,845,169 is 542490
The LCD formula is LCD(a,b) = ( a x b) / GCF(a,b)
Step1:
Find the GCF of 642 and 845. To find the GCF, list down the factors of 642 and 845 and select the highest factor that appears in both lists of factors.
642 : [1, 2, 3, 6, 107, 214, 321, 642]
845 : [1, 5, 13, 65, 169, 845]
From this, we can see that the GCF of 642 and 845 is 1.
Now, put this into the LCD formula.
LCD(642, 845) = ( 642 x 845 ) / 1
LCD(642, 845) = 542490 / 1
LCD(642, 845) = 542490
Step2:
Find the GCF of 542490 and 169. To find the GCF, list down the factors of 542490 and 169 and select the highest factor that appears in both lists of factors.
542490 : [1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 107, 130, 169, 195, 214, 321, 338, 390, 507, 535, 642, 845, 1014, 1070, 1391, 1605, 1690, 2535, 2782, 3210, 4173, 5070, 6955, 8346, 13910, 18083, 20865, 36166, 41730, 54249, 90415, 108498, 180830, 271245, 542490]
169 : [1, 13, 169]
From this, we can see that the GCF of 542490 and 169 is 169.
Now, put this into the LCD formula.
LCD(542490, 169) = ( 542490 x 169 ) / 169
LCD(542490, 169) = 91680810 / 169
LCD(542490, 169) = 542490
LCD of 642,845,169 is 542490
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 .