The Purplemath Forums

Please don't freak when you read this question. It's easier than it looks (I think!). I am just dumb and not sure how to answer it. My textbook doesn't explain this method and I don't have a teacher so I'm stuck. (3/8y + 5/6x) / (5/12xy) The answer is: (9x + 20y) / 10 I am not sure how to add two fr...

Hi, that was helpful but not what I was looking for I'm afraid :(
How do I add two fractions that have different pronumerals in the denominator? So if I had:
3/a + 4/b
How would I simplify that?
Hope there is a way to do this, otherwise I'll have to call the publishers of the textbook and ask them!

okay, I don't know what's going on either!
How do I simplify 3/a + 4/b? Would the LCM be 1?

oh okay, I'll check it out. Thanks so much!