GCF of 18/520, 17/434, 642/728
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 18/520, 17/434, 642/728 i.e 1/112840 easily. The following is the detailed procedure to determine the greatest common factor of fractions 18/520, 17/434, 642/728.
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 18/520,17/434,642/728?
Given fractions are 18/520,17/434,642/728
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 18/520,17/434,642/728, numerators are 18,17,642
Denominators are 520,434,728
The GCF of 18,17,642 is 1 .
LCM of 520,434,728 is 112840.
The greatest common factor of 18/520,17/434,642/728 = [GCF of 18,17,642]/[LCM of 520,434,728]= 1/112840
Therefore, the GCF of 18/520,17/434,642/728 is 1/112840.
To find the highest common factor of 18,17,642, we have to find the factors of both numbers and list the highest common factor.
The factors of 18 are 1, 2, 3, 6, 9, 18
The factors of 17 are 1, 17
The factors of 642 are 1, 2, 3, 6, 107, 214, 321, 642
The HCF of 18,17,642 is 1.
Lets's calculate GCF of 18,17,642
∴ So GCF of numbers is 1 because of no common factors present between them.
Greatest Common Factor of 18,17,642 By Matching Biggest Common Factor Method
Now, list down the factors of 18
:1,2,3,6,9,18
Now, list down the factors of 17
:1,17
Now, list down the factors of 642
:1,2,3,6,107,214,321,642
Greatest Common Factor
We found the factors 18,17,642 . The biggest common factor number is the GCF number.
So the greatest common factor 18,17,642 is 1.
Lets's calculate LCM of 520,434,728
| 2 | 520, 434, 728 |
| 2 | 260, 217, 364 |
| 2 | 130, 217, 182 |
| 7 | 65, 217, 91 |
| 13 | 65, 31, 13 |
| 5, 31, 1 |
∴ So the LCM of the given numbers is 2 x 2 x 2 x 7 x 13 x 5 x 31 x 1 = 112840
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 1/112840
Therefore, the GCF of Fractions 18/520,17/434,642/728 is 1/112840
Least Common Multiple of 520,434,728 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 520,434,728 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(520,434,728) = 2
common factors(in case of two or more numbers have common factors) = 728
GCF(520,434,728) x common factors =2 x 728 = 1456
LCM(520,434,728) = ( 520 × 434 × 728 ) / 1456
LCM(520,434,728) = 164295040 / 1456
LCM(520,434,728) = 112840
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FAQs on GCF of Fractions of 18/520, 17/434, 642/728
1. What is the HCF of 18,17,642?
The HCF of 18,17,642 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 18/520, 17/434, 642/728?
Answer: GCF of Numerators as per given numbers 18/520, 17/434, 642/728 is
GCF of Numerators i.e. for 18,17,642 is 1
LCM of denominators i.e. for 520,434,728 is 112840.
Thus, GCF of Fractions is 1/112840.Finally, GCF of Fractions for 18/520, 17/434, 642/728 is 1/112840.