In math how do you subtract fractions?

Question

how do you subtract fractions when theres not a common denominater

Answer 1

LCM rule...

put the fraction to a common denominator...  

Answer 2

You just need to make the denominator the same.

For example:

1/2 - 1/3

2 x 3 = 6

6 is the least common denominator.

1/2 = 3/6

1/3 = 2/6

3/6 - 2/6 = 1/6.

Answer 3

there is always a common denominator... if you have to, multiply the two denominators together, that will always be a common denominator...however it may not be the least one, its a little guess and check too