**RESULT**

GCF(**9**, **15**) = **3**

**DESCRIPTIONS**

Prime factorization of 9 :

(**9** = **3** × **3**)

Prime factorization of 15 :

(**15** = **3** × **5**)

- 9 =
× 3__3__ - 15 =
× 5__3__

The only common prime factor of 9 and 15 is **3**. GCF is equal to that prime factor.

GCF(**9**, **15**) = **3**

The solution and descriptions above are generated by the GCF calculator. You can use the GCF calculator to see the greatest common factors of other numbers.

The greatest common factor (GCF) of two positive whole numbers is the largest number that divides these numbers exactly. GCF can be found by using the prime factorization method. It is equal to the product of all common prime factors in the factorization.

👉 Click here to see the GCF calculation of 9 and 15 using the cake method.

👉 Click here to see the LCM calculation of 9 and 15 using the cake method.

👉 Click here to see the LCM calculation of 9 and 15 using the prime factorization method.