Greatest Common Factor of 30/38, 42/28, 639/75

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

GCF of 30/38, 42/28, 639/75

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 30/38,42/28,639/75

Given fractions are 30/38,42/28,639/75

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 30,42,639

Greatest Common Factor of Numerators i.e. GCF of 30,42,639 is 3 .

LCM of Denominators means LCM of 38,28,75 as per the given fractions.

LCM of 38,28,75 is 39900 as it is the smallest common factor for both these numbers.

Lets's calculate GCF of 30,42,639

GCF of Fractions 30/38,42/28,639/75 is 3/39900

3 30, 42, 639
10, 14, 213

∴ So the GCF of the given numbers is 3 = 3

Greatest Common Factor of 30,42,639 By Matching Biggest Common Factor Method

Greatest Common Factor of 30,42,639 By Matching Biggest Common Factor Method

Factors of 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

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 639

List of positive integer factors of 639 that divides 639 without a remainder.

1,3,9,71,213,639

Greatest Common Factor

We found the factors 30,42,639 . The biggest common factor number is the GCF number.
So the greatest common factor 30,42,639 is 3.

Lets's calculate LCM of 38,28,75

2 38, 28, 75
19, 14, 75

∴ So the LCM of the given numbers is 2 x 19 x 14 x 75 = 39900

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 3/39900

Therefore, the GCF of Fractions 30/38,42/28,639/75 is 3/39900

Least Common Multiple of 38,28,75 with GCF Formula

Least Common Multiple of 38,28,75 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 38,28,75 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(38,28,75) = 1

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

GCF(38,28,75) x common factors =1 x 2 = 2

LCM(38,28,75) = ( 38 × 28 × 75 ) / 2

LCM(38,28,75) = 79800 / 2

LCM(38,28,75) = 39900


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 30/38, 42/28, 639/75

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 30/38, 42/28, 639/75?

Answer: GCF of Numerators as per given numbers 30/38, 42/28, 639/75 is

GCF of Numerators i.e. for 30,42,639 is 3

LCM of denominators i.e. for 38,28,75 is 39900.

Thus, GCF of Fractions is 3/39900.Finally, GCF of Fractions for 30/38, 42/28, 639/75 is 3/39900.