Greatest Common Factor of 78/40, 81/54, 98/79, 45/639

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of 78/40, 81/54, 98/79, 45/639

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 78/40,81/54,98/79,45/639

Given fractions are 78/40,81/54,98/79,45/639

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 78,81,98,45

Greatest Common Factor of Numerators i.e. GCF of 78,81,98,45 is 1 .

LCM of Denominators means LCM of 40,54,79,639 as per the given fractions.

LCM of 40,54,79,639 is 6057720 as it is the smallest common factor for both these numbers.

Lets's calculate GCF of 78,81,98,45

GCF of Fractions 78/40,81/54,98/79,45/639 is 1/6057720

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

Greatest Common Factor of 78,81,98,45 By Matching Biggest Common Factor Method

Greatest Common Factor of 78,81,98,45 By Matching Biggest Common Factor Method

Factors of 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 81

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

1,3,9,27,81

Factors of 98

List of positive integer factors of 98 that divides 98 without a remainder.

1,2,7,14,49,98

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Greatest Common Factor

We found the factors 78,81,98,45 . The biggest common factor number is the GCF number.
So the greatest common factor 78,81,98,45 is 1.

Lets's calculate LCM of 40,54,79,639

2 40, 54, 79, 639
3 20, 27, 79, 639
3 20, 9, 79, 213
20, 3, 79, 71

∴ So the LCM of the given numbers is 2 x 3 x 3 x 20 x 3 x 79 x 71 = 6057720

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/6057720

Therefore, the GCF of Fractions 78/40,81/54,98/79,45/639 is 1/6057720

Least Common Multiple of 40,54,79,639 with GCF Formula

Least Common Multiple of 40,54,79,639 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 40,54,79,639 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(40,54,79,639) = 1

common factors(in case of two or more numbers have common factors) = 18

GCF(40,54,79,639) x common factors =1 x 18 = 18

LCM(40,54,79,639) = ( 40 × 54 × 79 × 639 ) / 18

LCM(40,54,79,639) = 109038960 / 18

LCM(40,54,79,639) = 6057720


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 78/40, 81/54, 98/79, 45/639

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 78/40, 81/54, 98/79, 45/639?

Answer: GCF of Numerators as per given numbers 78/40, 81/54, 98/79, 45/639 is

GCF of Numerators i.e. for 78,81,98,45 is 1

LCM of denominators i.e. for 40,54,79,639 is 6057720.

Thus, GCF of Fractions is 1/6057720.Finally, GCF of Fractions for 78/40, 81/54, 98/79, 45/639 is 1/6057720.