Use our free GCF of Fractions Calculator tool to compute the GCF of 813/720, 817/861 i.e 1/206640 easily. The following is the detailed procedure to determine the greatest common factor of fractions 813/720, 817/861.
Enter two or more fractions separated by "commas"
Ex: 2/3, 5/7 or 3/5, 5/9, 7/3
Given fractions are 813/720,817/861
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 813/720,817/861, numerators are 813,817
Denominators are 720,861
The GCF of 813,817 is 1 .
LCM of 720,861 is 206640.
The greatest common factor of 813/720,817/861 = [GCF of 813,817]/[LCM of 720,861]= 1/206640
Therefore, the GCF of 813/720,817/861 is 1/206640.
To find the highest common factor of 813,817, we have to find the factors of both numbers and list the highest common factor.
The factors of 813 are 1, 3, 271, 813
The factors of 817 are 1, 19, 43, 817
The HCF of 813,817 is 1.
Lets's calculate GCF of 813,817
∴ So GCF of numbers is 1 because of no common factors present between them.
Now, list down the factors of 813
:1,3,271,813
Now, list down the factors of 817
:1,19,43,817
Greatest Common Factor
We found the factors 813,817 . The biggest common factor number is the GCF number.
So the greatest common factor 813,817 is 1.
Lets's calculate LCM of 720,861
3 | 720, 861 |
240, 287 |
∴ So the LCM of the given numbers is 3 x 240 x 287 = 206640
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/206640
Therefore, the GCF of Fractions 813/720,817/861 is 1/206640
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 720,861 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(720,861) = 3
common factors(in case of two or more numbers have common factors) = 1
GCF(720,861) x common factors =3 x 1 = 3
LCM(720,861) = ( 720 × 861 ) / 3
LCM(720,861) = 619920 / 3
LCM(720,861) = 206640
Here are some samples of GCF of Fractions calculations.
1. What is the HCF of 813,817?
The HCF of 813,817 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 813/720, 817/861?
Answer: GCF of Numerators as per given numbers 813/720, 817/861 is
GCF of Numerators i.e. for 813,817 is 1
LCM of denominators i.e. for 720,861 is 206640.
Thus, GCF of Fractions is 1/206640.Finally, GCF of Fractions for 813/720, 817/861 is 1/206640.