GCF of 21/17, 309/53, 831/440
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 21/17, 309/53, 831/440 i.e 3/396440 easily. The following is the detailed procedure to determine the greatest common factor of fractions 21/17, 309/53, 831/440.
Enter two or more fractions separated by "commas"
Ex: 2/3, 5/7 or 3/5, 5/9, 7/3
What is the GCF of 21/17,309/53,831/440?
Given fractions are 21/17,309/53,831/440
To find the GCF of fractions, we have to find the GCF of numerator numbers and LCM of denominator numbers. Its formula is given by
GCF of Fraction = Greatest Common Factor of Numerator/Least Common Multiple of Denominators
In the fractions 21/17,309/53,831/440, numerators are 21,309,831
Denominators are 17,53,440
The GCF of 21,309,831 is 3 .
LCM of 17,53,440 is 396440.
The greatest common factor of 21/17,309/53,831/440 = [GCF of 21,309,831]/[LCM of 17,53,440]= 3/396440
Therefore, the GCF of 21/17,309/53,831/440 is 3/396440.
To find the highest common factor of 21,309,831, we have to find the factors of both numbers and list the highest common factor.
The factors of 21 are 1, 3, 7, 21
The factors of 309 are 1, 3, 103, 309
The factors of 831 are 1, 3, 277, 831
The HCF of 21,309,831 is 3.
Lets's calculate GCF of 21,309,831
| 3 | 21, 309, 831 |
| 7, 103, 277 |
∴ So the GCF of the given numbers is 3 = 3
Greatest Common Factor of 21,309,831 By Matching Biggest Common Factor Method
Now, list down the factors of 21
:1,3,7,21
Now, list down the factors of 309
:1,3,103,309
Now, list down the factors of 831
:1,3,277,831
Greatest Common Factor
We found the factors 21,309,831 . The biggest common factor number is the GCF number.
So the greatest common factor 21,309,831 is 3.
Lets's calculate LCM of 17,53,440
Given numbers has no common factors except 1. So, there LCM is their product i.e 396440
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 3/396440
Therefore, the GCF of Fractions 21/17,309/53,831/440 is 3/396440
Least Common Multiple of 17,53,440 with GCF Formula
The formula of LCM is LCM(a1,a2,a3....,an) = ( a1 × a2 × a3 × .... × an) / GCF(a1,a2,a3....,an) x common factors(if more than 2 numbers have common factors).
We need to calculate greatest common factor of 17,53,440 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(17,53,440) = 1
common factors(in case of two or more numbers have common factors) = 1
GCF(17,53,440) x common factors =1 x 1 = 1
LCM(17,53,440) = ( 17 × 53 × 440 ) / 1
LCM(17,53,440) = 396440 / 1
LCM(17,53,440) = 396440
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FAQs on GCF of Fractions of 21/17, 309/53, 831/440
1. What is the HCF of 21,309,831?
The HCF of 21,309,831 is 3
2. What is the GCF of a fraction?
The GCF of a fraction is defined as the greatest fraction that divides exactly into 2 or more fractions.
3. How to find GCF in Fractions?
Answer: GCF of fractions can be found using the simple formula GCF of Fractions = GCF of Numerators/LCM of Denominators.
4. What is the GCF of Fractions for 21/17, 309/53, 831/440?
Answer: GCF of Numerators as per given numbers 21/17, 309/53, 831/440 is
GCF of Numerators i.e. for 21,309,831 is 3
LCM of denominators i.e. for 17,53,440 is 396440.
Thus, GCF of Fractions is 3/396440.Finally, GCF of Fractions for 21/17, 309/53, 831/440 is 3/396440.