GCF of 780/821, 390/498
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 780/821, 390/498 i.e 390/408858 easily. The following is the detailed procedure to determine the greatest common factor of fractions 780/821, 390/498.
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 780/821,390/498?
Given fractions are 780/821,390/498
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 780/821,390/498, numerators are 780,390
Denominators are 821,498
The GCF of 780,390 is 390 .
LCM of 821,498 is 408858.
The greatest common factor of 780/821,390/498 = [GCF of 780,390]/[LCM of 821,498]= 390/408858
Therefore, the GCF of 780/821,390/498 is 390/408858.
To find the highest common factor of 780,390, we have to find the factors of both numbers and list the highest common factor.
The factors of 780 are 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
The factors of 390 are 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
The HCF of 780,390 is 390.
Lets's calculate GCF of 780,390
| 2 | 780, 390 |
| 3 | 390, 195 |
| 5 | 130, 65 |
| 13 | 26, 13 |
| 2, 1 |
∴ So the GCF of the given numbers is 2 x 3 x 5 x 13 = 390
Greatest Common Factor of 780,390 By Matching Biggest Common Factor Method
Now, list down the factors of 780
:1,2,3,4,5,6,10,12,13,15,20,26,30,39,52,60,65,78,130,156,195,260,390,780
Now, list down the factors of 390
:1,2,3,5,6,10,13,15,26,30,39,65,78,130,195,390
Greatest Common Factor
We found the factors 780,390 . The biggest common factor number is the GCF number.
So the greatest common factor 780,390 is 390.
Lets's calculate LCM of 821,498
Given numbers has no common factors except 1. So, there LCM is their product i.e 408858
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 390/408858
Therefore, the GCF of Fractions 780/821,390/498 is 390/408858
Least Common Multiple of 821,498 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 821,498 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(821,498) = 1
common factors(in case of two or more numbers have common factors) = 1
GCF(821,498) x common factors =1 x 1 = 1
LCM(821,498) = ( 821 × 498 ) / 1
LCM(821,498) = 408858 / 1
LCM(821,498) = 408858
GCF of Fractions Calculation Examples
Here are some samples of GCF of Fractions calculations.
FAQs on GCF of Fractions of 780/821, 390/498
1. What is the HCF of 780,390?
The HCF of 780,390 is 390
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 780/821, 390/498?
Answer: GCF of Numerators as per given numbers 780/821, 390/498 is
GCF of Numerators i.e. for 780,390 is 390
LCM of denominators i.e. for 821,498 is 408858.
Thus, GCF of Fractions is 390/408858.Finally, GCF of Fractions for 780/821, 390/498 is 390/408858.