GCF of 420/74, 861/520
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 420/74, 861/520 i.e 21/19240 easily. The following is the detailed procedure to determine the greatest common factor of fractions 420/74, 861/520.
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 420/74,861/520?
Given fractions are 420/74,861/520
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 420/74,861/520, numerators are 420,861
Denominators are 74,520
The GCF of 420,861 is 21 .
LCM of 74,520 is 19240.
The greatest common factor of 420/74,861/520 = [GCF of 420,861]/[LCM of 74,520]= 21/19240
Therefore, the GCF of 420/74,861/520 is 21/19240.
To find the highest common factor of 420,861, 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 861 are 1, 3, 7, 21, 41, 123, 287, 861
The HCF of 420,861 is 21.
Lets's calculate GCF of 420,861
| 3 | 420, 861 |
| 7 | 140, 287 |
| 20, 41 |
∴ So the GCF of the given numbers is 3 x 7 = 21
Greatest Common Factor of 420,861 By Matching Biggest Common Factor Method
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 861
:1,3,7,21,41,123,287,861
Greatest Common Factor
We found the factors 420,861 . The biggest common factor number is the GCF number.
So the greatest common factor 420,861 is 21.
Lets's calculate LCM of 74,520
| 2 | 74, 520 |
| 37, 260 |
∴ So the LCM of the given numbers is 2 x 37 x 260 = 19240
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 21/19240
Therefore, the GCF of Fractions 420/74,861/520 is 21/19240
Least Common Multiple of 74,520 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 74,520 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(74,520) = 2
common factors(in case of two or more numbers have common factors) = 1
GCF(74,520) x common factors =2 x 1 = 2
LCM(74,520) = ( 74 × 520 ) / 2
LCM(74,520) = 38480 / 2
LCM(74,520) = 19240
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FAQs on GCF of Fractions of 420/74, 861/520
1. What is the HCF of 420,861?
The HCF of 420,861 is 21
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 420/74, 861/520?
Answer: GCF of Numerators as per given numbers 420/74, 861/520 is
GCF of Numerators i.e. for 420,861 is 21
LCM of denominators i.e. for 74,520 is 19240.
Thus, GCF of Fractions is 21/19240.Finally, GCF of Fractions for 420/74, 861/520 is 21/19240.