Greatest Common Factor of 71/77, 42/17, 81/39, 72/70

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of 71/77, 42/17, 81/39, 72/70

Enter two or more fractions separated by "commas"

Ex: 2/3, 5/7 or 3/5, 5/9, 7/3

GCF of:

Greatest Common Factor of 71/77,42/17,81/39,72/70

Given fractions are 71/77,42/17,81/39,72/70

Formula to find GCF of Fractions is

GCF = GCF of Numerators/LCM of Denominators

As per the formula GCF of Fractions let’s split into two parts and find the GCF of Numerators and LCM of Denominators

In the given fractions GCF of Numerators means GCF of 71,42,81,72

Greatest Common Factor of Numerators i.e. GCF of 71,42,81,72 is 1 .

LCM of Denominators means LCM of 77,17,39,70 as per the given fractions.

LCM of 77,17,39,70 is 510510 as it is the smallest common factor for both these numbers.

Lets's calculate GCF of 71,42,81,72

GCF of Fractions 71/77,42/17,81/39,72/70 is 1/510510

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

Greatest Common Factor of 71,42,81,72 By Matching Biggest Common Factor Method

Greatest Common Factor of 71,42,81,72 By Matching Biggest Common Factor Method

Factors of 71

List of positive integer factors of 71 that divides 71 without a remainder.

1,71

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Greatest Common Factor

We found the factors 71,42,81,72 . The biggest common factor number is the GCF number.
So the greatest common factor 71,42,81,72 is 1.

Lets's calculate LCM of 77,17,39,70

7 77, 17, 39, 70
11, 17, 39, 10

∴ So the LCM of the given numbers is 7 x 11 x 17 x 39 x 10 = 510510

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/510510

Therefore, the GCF of Fractions 71/77,42/17,81/39,72/70 is 1/510510

Least Common Multiple of 77,17,39,70 with GCF Formula

Least Common Multiple of 77,17,39,70 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 77,17,39,70 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(77,17,39,70) = 1

common factors(in case of two or more numbers have common factors) = 7

GCF(77,17,39,70) x common factors =1 x 7 = 7

LCM(77,17,39,70) = ( 77 × 17 × 39 × 70 ) / 7

LCM(77,17,39,70) = 3573570 / 7

LCM(77,17,39,70) = 510510


GCF of Fractions Calculation Examples

Here are some samples of GCF of Fractions calculations.

GCF of Fractions Calculation Examples

Here are some samples of GCF of Fractions calculations.

Frequently Asked Questions on Fractional GCF of 71/77, 42/17, 81/39, 72/70

1. 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.

2. What is the GCF of Fractions for 71/77, 42/17, 81/39, 72/70?

Answer: GCF of Numerators as per given numbers 71/77, 42/17, 81/39, 72/70 is

GCF of Numerators i.e. for 71,42,81,72 is 1

LCM of denominators i.e. for 77,17,39,70 is 510510.

Thus, GCF of Fractions is 1/510510.Finally, GCF of Fractions for 71/77, 42/17, 81/39, 72/70 is 1/510510.