GCF of 56/28, 28/43, 688/690
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
Use our free GCF of Fractions Calculator tool to compute the GCF of 56/28, 28/43, 688/690 i.e 4/415380 easily. The following is the detailed procedure to determine the greatest common factor of fractions 56/28, 28/43, 688/690.
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 56/28,28/43,688/690?
Given fractions are 56/28,28/43,688/690
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 56/28,28/43,688/690, numerators are 56,28,688
Denominators are 28,43,690
The GCF of 56,28,688 is 4 .
LCM of 28,43,690 is 415380.
The greatest common factor of 56/28,28/43,688/690 = [GCF of 56,28,688]/[LCM of 28,43,690]= 4/415380
Therefore, the GCF of 56/28,28/43,688/690 is 4/415380.
To find the highest common factor of 56,28,688, we have to find the factors of both numbers and list the highest common factor.
The factors of 56 are 1, 2, 4, 7, 8, 14, 28, 56
The factors of 28 are 1, 2, 4, 7, 14, 28
The factors of 688 are 1, 2, 4, 8, 16, 43, 86, 172, 344, 688
The HCF of 56,28,688 is 4.
Lets's calculate GCF of 56,28,688
| 2 | 56, 28, 688 |
| 2 | 28, 14, 344 |
| 7, 14, 172 |
∴ So the GCF of the given numbers is 2 x 2 = 4
Greatest Common Factor of 56,28,688 By Matching Biggest Common Factor Method
Now, list down the factors of 56
:1,2,4,7,8,14,28,56
Now, list down the factors of 28
:1,2,4,7,14,28
Now, list down the factors of 688
:1,2,4,8,16,43,86,172,344,688
Greatest Common Factor
We found the factors 56,28,688 . The biggest common factor number is the GCF number.
So the greatest common factor 56,28,688 is 4.
Lets's calculate LCM of 28,43,690
| 2 | 28, 43, 690 |
| 14, 43, 345 |
∴ So the LCM of the given numbers is 2 x 14 x 43 x 345 = 415380
Thus GCF of Fractions = GCF of Numerators/LCM of Denominators = 4/415380
Therefore, the GCF of Fractions 56/28,28/43,688/690 is 4/415380
Least Common Multiple of 28,43,690 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 28,43,690 and common factors if more than two numbers have common factor, than apply into the LCM equation.
GCF(28,43,690) = 1
common factors(in case of two or more numbers have common factors) = 2
GCF(28,43,690) x common factors =1 x 2 = 2
LCM(28,43,690) = ( 28 × 43 × 690 ) / 2
LCM(28,43,690) = 830760 / 2
LCM(28,43,690) = 415380
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FAQs on GCF of Fractions of 56/28, 28/43, 688/690
1. What is the HCF of 56,28,688?
The HCF of 56,28,688 is 4
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 56/28, 28/43, 688/690?
Answer: GCF of Numerators as per given numbers 56/28, 28/43, 688/690 is
GCF of Numerators i.e. for 56,28,688 is 4
LCM of denominators i.e. for 28,43,690 is 415380.
Thus, GCF of Fractions is 4/415380.Finally, GCF of Fractions for 56/28, 28/43, 688/690 is 4/415380.