LCD of Calculator
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.
Given numbers are 645,400,252
We can find the LCD of numbers 645,400,252 by the prime factorization method or by applying the LCD formula.
The LCD of 645,400,252 is 1083600.
Method to Find Least Common Denominator of 645,400,252 with Prime Factorization
| 2 | 645, 400, 252 |
| 2 | 645, 200, 126 |
| 3 | 645, 100, 63 |
| 5 | 215, 100, 21 |
| 43, 20, 21 |
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 3 x 5 x 43 x 20 x 21 = 1083600
Thus, we have determined that the LCD of 645,400,252 is 1083600
The LCD formula is LCD(a,b) = ( a x b) / GCF(a,b)
Step1:
Find the GCF of 645 and 400. To find the GCF, list down the factors of 645 and 400 and select the highest factor that appears in both lists of factors.
645 : [1, 3, 5, 15, 43, 129, 215, 645]
400 : [1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400]
From this, we can see that the GCF of 645 and 400 is 5.
Now, put this into the LCD formula.
LCD(645, 400) = ( 645 x 400 ) / 5
LCD(645, 400) = 258000 / 5
LCD(645, 400) = 51600
Step2:
Find the GCF of 51600 and 252. To find the GCF, list down the factors of 51600 and 252 and select the highest factor that appears in both lists of factors.
51600 : [1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 40, 43, 48, 50, 60, 75, 80, 86, 100, 120, 129, 150, 172, 200, 215, 240, 258, 300, 344, 400, 430, 516, 600, 645, 688, 860, 1032, 1075, 1200, 1290, 1720, 2064, 2150, 2580, 3225, 3440, 4300, 5160, 6450, 8600, 10320, 12900, 17200, 25800, 51600]
252 : [1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 252]
From this, we can see that the GCF of 51600 and 252 is 12.
Now, put this into the LCD formula.
LCD(51600, 252) = ( 51600 x 252 ) / 12
LCD(51600, 252) = 13003200 / 12
LCD(51600, 252) = 1083600
LCD of 645,400,252 is 1083600
LCD of Numbers Calculation Examples
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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 .