GCF of 28 and 48


The gcf of 28 and 48 is the largest positive integer that divides the numbers 28 and 48 without a remainder. Spelled out, it is the greatest common factor of 28 and 48. Here you can find the gcf of 28 and 48, along with a total of three methods for computing it. In addition, we have a calculator you should check out. Not only can it determine the gcf of 28 and 48, but also that of three or more integers including twenty-eight and forty-eight for example. Keep reading to learn everything about the gcf (28,48) and the terms related to it.

What is the GCF of 28 and 48

If you just want to know what is the greatest common factor of 28 and 48, it is 4. Usually, this is written as

gcf(28,48) = 4

The gcf of 28 and 48 can be obtained like this:

  • The factors of 28 are 28, 14, 7, 4, 2, 1.
  • The factors of 48 are 48, 24, 16, 12, 8, 6, 4, 3, 2, 1.
  • The common factors of 28 and 48 are 4, 2, 1, intersecting the two sets above.
  • In the intersection factors of 28 ∩ factors of 48 the greatest element is 4.
  • Therefore, the greatest common factor of 28 and 48 is 4.

Taking the above into account you also know how to find all the common factors of 28 and 48, not just the greatest. In the next section we show you how to calculate the gcf of twenty-eight and forty-eight by means of two more methods.

How to find the GCF of 28 and 48

The greatest common factor of 28 and 48 can be computed by using the least common multiple aka lcm of 28 and 48. This is the easiest approach:

gcf (28,48) = $\frac{28 \times 48}{lcm(28,48)} = \frac{1344}{336}$ = 4

Alternatively, the gcf of 28 and 48 can be found using the prime factorization of 28 and 48:

  • The prime factorization of 28 is: 2 x 2 x 7
  • The prime factorization of 48 is: 2 x 2 x 2 x 2 x 3
  • The prime factors and multiplicities 28 and 48 have in common are: 2 x 2
  • 2 x 2 is the gcf of 28 and 48
  • gcf(28,48) = 4

In any case, the easiest way to compute the gcf of two numbers like 28 and 48 is by using our calculator below. Note that it can also compute the gcf of more than two numbers, separated by a comma. For example, enter 28,48. The calculation is conducted automatically.

The gcf is...
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Use of GCF of 28 and 48

What is the greatest common factor of 28 and 48 used for? Answer: It is helpful for reducing fractions like 28 / 48. Just divide the nominator as well as the denominator by the gcf (28,48) to reduce the fraction to lowest terms.

$\frac{28}{48} = \frac{\frac{28}{4}}{\frac{48}{4}} = \frac{7}{12}$.

Properties of GCF of 28 and 48

The most important properties of the gcf(28,48) are:

  • Commutative property: gcf(28,48) = gcf(48,28)
  • Associative property: gcf(28,48,n) = gcf(gcf(48,28),n) $\hspace{10px}n\hspace{3px}\epsilon\hspace{3px}\mathbb{Z}$

The associativity is particularly useful to get the gcf of three or more numbers; our calculator makes use of it.

To sum up, the gcf of 28 and 48 is 4. In common notation: gcf (28,48) = 4.

If you have been searching for gcf 28 and 48 or gcf 28 48 then you have come to the correct page, too. The same is the true if you typed gcf for 28 and 48 in your favorite search engine.

Note that you can find the greatest common factor of many integer pairs including twenty-eight / forty-eight by using the the search form in the sidebar of this page.

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