The greatest common factor is used to reduce fractions.
It is used to find the greatest common divisor, or highest common factor, of two given numbers
Just use the GCF(greatest common factor
The common factor of 4 and 9 is 1.
To reduce fractions
When simplifying fractions.
Yes, they do.
The greatest common factor is a function of two numbers-- it is the greatest factor that the numbers have in common. The concept does not apply to a single number. Now you can use the same number twice and ask what is the greatest common factor of 240 and 240 and the answer would be 240.
It won't help. The lowest common factor of any two positive integers is 1.
Use the GCF. The LCF is always 1.