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LCD of Calculator

Created By : Jatin Gogia
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023


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.

 

LCD of

How to Find LCD of 840,305,244 ?

Given numbers are 840,305,244

We can find the LCD of numbers 840,305,244 by the prime factorization method or by applying the LCD formula.

The LCD of 840,305,244 is 51240.


Method to Find Least Common Denominator of 840,305,244 with Prime Factorization

2 840, 305, 244
2 420, 305, 122
5 210, 305, 61
61 42, 61, 61
42, 1, 1

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 2 x 5 x 61 x 42 x 1 x 1 = 51240

Thus, we have determined that the LCD of 840,305,244 is 51240

LCD Formula to Find LCD of 840,305,244

The LCD formula is LCD(a,b) = ( a x b) / GCF(a,b)


Step1:

Find the GCF of 840 and 305. To find the GCF, list down the factors of 840 and 305 and select the highest factor that appears in both lists of factors.

840 : [1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840]

305 : [1, 5, 61, 305]

From this, we can see that the GCF of 840 and 305 is 5.

Now, put this into the LCD formula.

LCD(840, 305) = ( 840 x 305 ) / 5

LCD(840, 305) = 256200 / 5

LCD(840, 305) = 51240


Step2:

Find the GCF of 51240 and 244. To find the GCF, list down the factors of 51240 and 244 and select the highest factor that appears in both lists of factors.

51240 : [1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 61, 70, 84, 105, 120, 122, 140, 168, 183, 210, 244, 280, 305, 366, 420, 427, 488, 610, 732, 840, 854, 915, 1220, 1281, 1464, 1708, 1830, 2135, 2440, 2562, 3416, 3660, 4270, 5124, 6405, 7320, 8540, 10248, 12810, 17080, 25620, 51240]

244 : [1, 2, 4, 61, 122, 244]

From this, we can see that the GCF of 51240 and 244 is 244.

Now, put this into the LCD formula.

LCD(51240, 244) = ( 51240 x 244 ) / 244

LCD(51240, 244) = 12502560 / 244

LCD(51240, 244) = 51240

LCD of 840,305,244 is 51240

LCD of Numbers Calculation Examples

Frequently Asked Questions on LCD of

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 .