How to Find GCF of 31/21, 79/10, 208/386?

GCF of 31/21, 79/10, 208/386

Created By : Veerendra
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023

Use our free GCF of Fractions Calculator tool to compute the GCF of 31/21, 79/10, 208/386 i.e 1/40530 easily. The following is the detailed procedure to determine the greatest common factor of fractions 31/21, 79/10, 208/386.

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 31/21,79/10,208/386?

Given fractions are 31/21,79/10,208/386

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 31/21,79/10,208/386, numerators are 31,79,208

Denominators are 21,10,386

The GCF of 31,79,208 is 1 .

LCM of 21,10,386 is 40530.

The greatest common factor of 31/21,79/10,208/386 = [GCF of 31,79,208]/[LCM of 21,10,386]= 1/40530

Therefore, the GCF of 31/21,79/10,208/386 is 1/40530.

Greatest Common Factor of 31,79,208

To find the highest common factor of 31,79,208, we have to find the factors of both numbers and list the highest common factor.

The factors of 31 are 1, 31

The factors of 79 are 1, 79

The factors of 208 are 1, 2, 4, 8, 13, 16, 26, 52, 104, 208

The HCF of 31,79,208 is 1.

Lets's calculate GCF of 31,79,208

Greatest Common Factor (GCF) of 31,79,208 By Common Division

∴ So GCF of numbers is 1 because of no common factors present between them.

Greatest Common Factor of 31,79,208 By Matching Biggest Common Factor Method

Now, list down the factors of 31

1,31

Now, list down the factors of 79

1,79

Now, list down the factors of 208

1,2,4,8,13,16,26,52,104,208

Greatest Common Factor

We found the factors 31,79,208 . The biggest common factor number is the GCF number.
So the greatest common factor 31,79,208 is 1.

Lets's calculate LCM of 21,10,386

Lowest Common Multiple of 21,10,386 using Common Division

2	21, 10, 386
	21, 5, 193

∴ So the LCM of the given numbers is 2 x 21 x 5 x 193 = 40530

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/40530

Therefore, the GCF of Fractions 31/21,79/10,208/386 is 1/40530

Least Common Multiple of 21,10,386 with GCF Formula

The formula of LCM is LCM(a₁,a₂,a₃....,a_n) = ( a₁ × a₂ × a₃ × .... × a_n) / GCF(a₁,a₂,a₃....,a_n) x common factors(if more than 2 numbers have common factors).

We need to calculate greatest common factor of 21,10,386 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(21,10,386) = 1

common factors(in case of two or more numbers have common factors) = 2

GCF(21,10,386) x common factors =1 x 2 = 2

LCM(21,10,386) = ( 21 × 10 × 386 ) / 2

LCM(21,10,386) = 81060 / 2

LCM(21,10,386) = 40530

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FAQs on GCF of Fractions of 31/21, 79/10, 208/386

1. What is the HCF of 31,79,208?

The HCF of 31,79,208 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 31/21, 79/10, 208/386?

Answer: GCF of Numerators as per given numbers 31/21, 79/10, 208/386 is

GCF of Numerators i.e. for 31,79,208 is 1

LCM of denominators i.e. for 21,10,386 is 40530.

Thus, GCF of Fractions is 1/40530.Finally, GCF of Fractions for 31/21, 79/10, 208/386 is 1/40530.