How to Find GCF of 20/72, 17/10, 621/972?

GCF of 20/72, 17/10, 621/972

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 20/72, 17/10, 621/972 i.e 1/9720 easily. The following is the detailed procedure to determine the greatest common factor of fractions 20/72, 17/10, 621/972.

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 20/72,17/10,621/972?

Given fractions are 20/72,17/10,621/972

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 20/72,17/10,621/972, numerators are 20,17,621

Denominators are 72,10,972

The GCF of 20,17,621 is 1 .

LCM of 72,10,972 is 9720.

The greatest common factor of 20/72,17/10,621/972 = [GCF of 20,17,621]/[LCM of 72,10,972]= 1/9720

Therefore, the GCF of 20/72,17/10,621/972 is 1/9720.

Greatest Common Factor of 20,17,621

To find the highest common factor of 20,17,621, we have to find the factors of both numbers and list the highest common factor.

The factors of 20 are 1, 2, 4, 5, 10, 20

The factors of 17 are 1, 17

The factors of 621 are 1, 3, 9, 23, 27, 69, 207, 621

The HCF of 20,17,621 is 1.

Lets's calculate GCF of 20,17,621

Greatest Common Factor (GCF) of 20,17,621 By Common Division

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

Greatest Common Factor of 20,17,621 By Matching Biggest Common Factor Method

Now, list down the factors of 20

1,2,4,5,10,20

Now, list down the factors of 17

1,17

Now, list down the factors of 621

1,3,9,23,27,69,207,621

Greatest Common Factor

We found the factors 20,17,621 . The biggest common factor number is the GCF number.
So the greatest common factor 20,17,621 is 1.

Lets's calculate LCM of 72,10,972

Lowest Common Multiple of 72,10,972 using Common Division

2	72, 10, 972
2	36, 5, 486
3	18, 5, 243
3	6, 5, 81
	2, 5, 27

∴ So the LCM of the given numbers is 2 x 2 x 3 x 3 x 2 x 5 x 27 = 9720

Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/9720

Therefore, the GCF of Fractions 20/72,17/10,621/972 is 1/9720

Least Common Multiple of 72,10,972 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 72,10,972 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(72,10,972) = 2

common factors(in case of two or more numbers have common factors) = 36

GCF(72,10,972) x common factors =2 x 36 = 72

LCM(72,10,972) = ( 72 × 10 × 972 ) / 72

LCM(72,10,972) = 699840 / 72

LCM(72,10,972) = 9720

GCF of Fractions Calculation Examples

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FAQs on GCF of Fractions of 20/72, 17/10, 621/972

1. What is the HCF of 20,17,621?

The HCF of 20,17,621 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 20/72, 17/10, 621/972?

Answer: GCF of Numerators as per given numbers 20/72, 17/10, 621/972 is

GCF of Numerators i.e. for 20,17,621 is 1

LCM of denominators i.e. for 72,10,972 is 9720.

Thus, GCF of Fractions is 1/9720.Finally, GCF of Fractions for 20/72, 17/10, 621/972 is 1/9720.