GCF of 42/63, 720/40, 394/639
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 42/63, 720/40, 394/639 i.e 2/178920 easily. The following is the detailed procedure to determine the greatest common factor of fractions 42/63, 720/40, 394/639.
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 42/63,720/40,394/639?
Given fractions are 42/63,720/40,394/639
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 42/63,720/40,394/639, numerators are 42,720,394
Denominators are 63,40,639
The GCF of 42,720,394 is 2 .
LCM of 63,40,639 is 178920.
The greatest common factor of 42/63,720/40,394/639 = [GCF of 42,720,394]/[LCM of 63,40,639]= 2/178920
Therefore, the GCF of 42/63,720/40,394/639 is 2/178920.
To find the highest common factor of 42,720,394, we have to find the factors of both numbers and list the highest common factor.
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, 42
The factors of 720 are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
The factors of 394 are 1, 2, 197, 394
The HCF of 42,720,394 is 2.
Lets's calculate GCF of 42,720,394
| 2 | 42, 720, 394 |
| 21, 360, 197 |
∴ So the GCF of the given numbers is 2 = 2
Greatest Common Factor of 42,720,394 By Matching Biggest Common Factor Method
Now, list down the factors of 42
:1,2,3,6,7,14,21,42
Now, list down the factors of 720
:1,2,3,4,5,6,8,9,10,12,15,16,18,20,24,30,36,40,45,48,60,72,80,90,120,144,180,240,360,720
Now, list down the factors of 394
:1,2,197,394
Greatest Common Factor
We found the factors 42,720,394 . The biggest common factor number is the GCF number.
So the greatest common factor 42,720,394 is 2.
Lets's calculate LCM of 63,40,639
| 3 | 63, 40, 639 |
| 3 | 21, 40, 213 |
| 7, 40, 71 |
∴ So the LCM of the given numbers is 3 x 3 x 7 x 40 x 71 = 178920
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 2/178920
Therefore, the GCF of Fractions 42/63,720/40,394/639 is 2/178920
Least Common Multiple of 63,40,639 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 63,40,639 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(63,40,639) = 1
common factors(in case of two or more numbers have common factors) = 9
GCF(63,40,639) x common factors =1 x 9 = 9
LCM(63,40,639) = ( 63 × 40 × 639 ) / 9
LCM(63,40,639) = 1610280 / 9
LCM(63,40,639) = 178920
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FAQs on GCF of Fractions of 42/63, 720/40, 394/639
1. What is the HCF of 42,720,394?
The HCF of 42,720,394 is 2
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 42/63, 720/40, 394/639?
Answer: GCF of Numerators as per given numbers 42/63, 720/40, 394/639 is
GCF of Numerators i.e. for 42,720,394 is 2
LCM of denominators i.e. for 63,40,639 is 178920.
Thus, GCF of Fractions is 2/178920.Finally, GCF of Fractions for 42/63, 720/40, 394/639 is 2/178920.