# Simplify Fraction with same term in Num and Dem, but.

1. Oct 9, 2013

### zKarp

1. The problem statement, all variables and given/known data
I'm having a brain fart, how do you factor/simplify a fraction such as $\frac{ab}{ab+cd}$
I keep thinking multiply by ab-bc but I'm not sure.

Last edited: Oct 9, 2013
2. Oct 9, 2013

### Dick

Uh, the terms in the denominator have common factor b. Why don't you factor it out?

3. Oct 9, 2013

### zKarp

I'm sorry I miss typed it after using latex format. It's suppose to be DC not BC.

4. Oct 10, 2013

### Dick

Then I don't think there is any form that is terribly much simpler than what you written. You can change the form, like to 1/(1+(cd)/(ab)), but I don't think the alternate forms are much simpler.

5. Oct 10, 2013

### zKarp

Thank you! This actually does. I should of stated I'm doing transfer functions for circuit design and thats the type of form desired. Thank you!

6. Oct 10, 2013

### Dick

Ok, so I helped by accident. You're welcome!