what is the gcf of 12 and 15 and how do you do it

Question

anonymous · Answer

It is three remember what I told you:
12/15

divide by the 3 you get 4/5 which is the simplest form, so 3 is the GCF

anonymous · Answer

i did that but 4/5 cant = 3 lol                          can it

anonymous · Answer

I know but thats it you DONT  divide it. Just simplify the fraction. What number did you divide by in the numerator and denominator to get it to the simplest form.

anonymous · Answer

No dont divide those two number.

12   /3
___
15   /3

The 3 is the common factor, the 3 the GREATEST common factor, because you can't divide it by anything else that is larger in order for it to be wholes number, or without getting a decimal in the numerator or denominator. Get it?

anonymous · Answer

sorry i dont thank you for your time >>>>

zarkon · Answer

12=3*2*2
15=3*5

what they have in common is a 3 so that is the answer

anonymous · Answer

Here are some videos that will help: http://www.youtube.com/watch?v=3eyjE-FN4Tw http://www.youtube.com/watch?v=3jGAcpK2V7Q