GCF of 686/385, 1605/3880
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 686/385, 1605/3880 i.e 1/298760 easily. The following is the detailed procedure to determine the greatest common factor of fractions 686/385, 1605/3880.
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 686/385,1605/3880?
Given fractions are 686/385,1605/3880
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 686/385,1605/3880, numerators are 686,1605
Denominators are 385,3880
The GCF of 686,1605 is 1 .
LCM of 385,3880 is 298760.
The greatest common factor of 686/385,1605/3880 = [GCF of 686,1605]/[LCM of 385,3880]= 1/298760
Therefore, the GCF of 686/385,1605/3880 is 1/298760.
To find the highest common factor of 686,1605, we have to find the factors of both numbers and list the highest common factor.
The factors of 686 are 1, 2, 7, 14, 49, 98, 343, 686
The factors of 1605 are 1, 3, 5, 15, 107, 321, 535, 1605
The HCF of 686,1605 is 1.
Lets's calculate GCF of 686,1605
∴ So GCF of numbers is 1 because of no common factors present between them.
Greatest Common Factor of 686,1605 By Matching Biggest Common Factor Method
Now, list down the factors of 686
:1,2,7,14,49,98,343,686
Now, list down the factors of 1605
:1,3,5,15,107,321,535,1605
Greatest Common Factor
We found the factors 686,1605 . The biggest common factor number is the GCF number.
So the greatest common factor 686,1605 is 1.
Lets's calculate LCM of 385,3880
| 5 | 385, 3880 |
| 77, 776 |
∴ So the LCM of the given numbers is 5 x 77 x 776 = 298760
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/298760
Therefore, the GCF of Fractions 686/385,1605/3880 is 1/298760
Least Common Multiple of 385,3880 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 385,3880 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(385,3880) = 5
common factors(in case of two or more numbers have common factors) = 1
GCF(385,3880) x common factors =5 x 1 = 5
LCM(385,3880) = ( 385 × 3880 ) / 5
LCM(385,3880) = 1493800 / 5
LCM(385,3880) = 298760
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FAQs on GCF of Fractions of 686/385, 1605/3880
1. What is the HCF of 686,1605?
The HCF of 686,1605 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 686/385, 1605/3880?
Answer: GCF of Numerators as per given numbers 686/385, 1605/3880 is
GCF of Numerators i.e. for 686,1605 is 1
LCM of denominators i.e. for 385,3880 is 298760.
Thus, GCF of Fractions is 1/298760.Finally, GCF of Fractions for 686/385, 1605/3880 is 1/298760.