Use our free GCF of Fractions Calculator tool to compute the GCF of 420/792, 840/502 i.e 420/198792 easily. The following is the detailed procedure to determine the greatest common factor of fractions 420/792, 840/502.
Enter two or more fractions separated by "commas"
Ex: 2/3, 5/7 or 3/5, 5/9, 7/3
Given fractions are 420/792,840/502
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 420/792,840/502, numerators are 420,840
Denominators are 792,502
The GCF of 420,840 is 420 .
LCM of 792,502 is 198792.
The greatest common factor of 420/792,840/502 = [GCF of 420,840]/[LCM of 792,502]= 420/198792
Therefore, the GCF of 420/792,840/502 is 420/198792.
To find the highest common factor of 420,840, we have to find the factors of both numbers and list the highest common factor.
The factors of 420 are 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
The factors of 840 are 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
The HCF of 420,840 is 420.
Lets's calculate GCF of 420,840
2 | 420, 840 |
2 | 210, 420 |
3 | 105, 210 |
5 | 35, 70 |
7 | 7, 14 |
1, 2 |
∴ So the GCF of the given numbers is 2 x 2 x 3 x 5 x 7 = 420
Now, list down the factors of 420
:1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420
Now, list down the factors of 840
:1,2,3,4,5,6,7,8,10,12,14,15,20,21,24,28,30,35,40,42,56,60,70,84,105,120,140,168,210,280,420,840
Greatest Common Factor
We found the factors 420,840 . The biggest common factor number is the GCF number.
So the greatest common factor 420,840 is 420.
Lets's calculate LCM of 792,502
2 | 792, 502 |
396, 251 |
∴ So the LCM of the given numbers is 2 x 396 x 251 = 198792
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 420/198792
Therefore, the GCF of Fractions 420/792,840/502 is 420/198792
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 792,502 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(792,502) = 2
common factors(in case of two or more numbers have common factors) = 1
GCF(792,502) x common factors =2 x 1 = 2
LCM(792,502) = ( 792 × 502 ) / 2
LCM(792,502) = 397584 / 2
LCM(792,502) = 198792
Here are some samples of GCF of Fractions calculations.
1. What is the HCF of 420,840?
The HCF of 420,840 is 420
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 420/792, 840/502?
Answer: GCF of Numerators as per given numbers 420/792, 840/502 is
GCF of Numerators i.e. for 420,840 is 420
LCM of denominators i.e. for 792,502 is 198792.
Thus, GCF of Fractions is 420/198792.Finally, GCF of Fractions for 420/792, 840/502 is 420/198792.