Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I Why are fractions sometimes written as such: (A/B)/C?

  1. Mar 13, 2017 #1
    In my physics courses I have seen this kind of notation several times now: $$ \frac {A/B} {C}$$

    For instance:


    To me it doesn't seem intuitive and ## \frac A {BC}## would seem like a neater way of writing it. Therefore I wonder if there's any specific reason to why people write it like this.
  2. jcsd
  3. Mar 13, 2017 #2


    Staff: Mentor

    Your examples have one thing in common: they describe a rate of a quantity. The quantities are normed, i.e. they are something per unit of something. The notation ##\frac{A/B}{C}## emphasizes what it is about, namely the change of a special ratio, whereas ##\frac{A}{BC}## disguises this physically important difference even if not wrong.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: Why are fractions sometimes written as such: (A/B)/C?
  1. Why is c squared? (Replies: 9)

  2. Why Does Lightspeed = C? (Replies: 15)