GCF of 31/82, 64/28, 64/61, 78/20
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 31/82, 64/28, 64/61, 78/20 i.e 1/350140 easily. The following is the detailed procedure to determine the greatest common factor of fractions 31/82, 64/28, 64/61, 78/20.
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 31/82,64/28,64/61,78/20?
Given fractions are 31/82,64/28,64/61,78/20
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 31/82,64/28,64/61,78/20, numerators are 31,64,64,78
Denominators are 82,28,61,20
The GCF of 31,64,64,78 is 1 .
LCM of 82,28,61,20 is 350140.
The greatest common factor of 31/82,64/28,64/61,78/20 = [GCF of 31,64,64,78]/[LCM of 82,28,61,20]= 1/350140
Therefore, the GCF of 31/82,64/28,64/61,78/20 is 1/350140.
To find the highest common factor of 31,64,64,78, we have to find the factors of both numbers and list the highest common factor.
The factors of 31 are 1, 31
The factors of 64 are 1, 2, 4, 8, 16, 32, 64
The factors of 64 are 1, 2, 4, 8, 16, 32, 64
The factors of 78 are 1, 2, 3, 6, 13, 26, 39, 78
The HCF of 31,64,64,78 is 1.
Lets's calculate GCF of 31,64,64,78
∴ So GCF of numbers is 1 because of no common factors present between them.
Greatest Common Factor of 31,64,64,78 By Matching Biggest Common Factor Method
Now, list down the factors of 31
:1,31
Now, list down the factors of 64
:1,2,4,8,16,32,64
Now, list down the factors of 64
:1,2,4,8,16,32,64
Now, list down the factors of 78
:1,2,3,6,13,26,39,78
Greatest Common Factor
We found the factors 31,64,64,78 . The biggest common factor number is the GCF number.
So the greatest common factor 31,64,64,78 is 1.
Lets's calculate LCM of 82,28,61,20
| 2 | 82, 28, 61, 20 |
| 2 | 41, 14, 61, 10 |
| 41, 7, 61, 5 |
∴ So the LCM of the given numbers is 2 x 2 x 41 x 7 x 61 x 5 = 350140
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/350140
Therefore, the GCF of Fractions 31/82,64/28,64/61,78/20 is 1/350140
Least Common Multiple of 82,28,61,20 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 82,28,61,20 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(82,28,61,20) = 1
common factors(in case of two or more numbers have common factors) = 8
GCF(82,28,61,20) x common factors =1 x 8 = 8
LCM(82,28,61,20) = ( 82 × 28 × 61 × 20 ) / 8
LCM(82,28,61,20) = 2801120 / 8
LCM(82,28,61,20) = 350140
GCF of Fractions Calculation Examples
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FAQs on GCF of Fractions of 31/82, 64/28, 64/61, 78/20
1. What is the HCF of 31,64,64,78?
The HCF of 31,64,64,78 is 1
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 31/82, 64/28, 64/61, 78/20?
Answer: GCF of Numerators as per given numbers 31/82, 64/28, 64/61, 78/20 is
GCF of Numerators i.e. for 31,64,64,78 is 1
LCM of denominators i.e. for 82,28,61,20 is 350140.
Thus, GCF of Fractions is 1/350140.Finally, GCF of Fractions for 31/82, 64/28, 64/61, 78/20 is 1/350140.