With fractions do you always have to find a common denominator in addition, subtraction, multiplication and division?

Question

For each of the above mathematical operations?

Answer 1

only for add and subtract

Answer 2

So only for addition and subtraction you would find the common denominator? Not or multiplication or division?

Answer 3

What if you have 5/8 divided by 2/3?

I got 15/24 divided 16/24 and now I got stuck.

Answer 4

Why did you change these fractions to fractions with a common denominator?

Study this site.

http://www.mathsisfun.com/fractions_division.html

Answer 5

Okay that is easy.

So then my answer would be 15/16

5/8 divided by 2/3

5/8 x 3/2=15/16

Answer 6

Thank you Ms. Sue.

Answer 7

Yes, 15/16

You're welcome.