# Thread: Help with simple dividing

1. ## Help with simple dividing

Wow, I still have some troubles when I have a fraction of a fraction:
see here: https://screenshots.firefoxuserconte...ea945191d9.png
How do I distinguish between 2 and 3?

Like why this happened? https://screenshots.firefoxuserconte...1ee6cbb0eb.png --->
https://screenshots.firefoxuserconte...e38429afd0.png

Thanks.
why the n wend to the nominator and not to the denominator? I'm confused...

2. ## Re: Help with simple dividing

Originally Posted by IloveIl
20
---
10
--
5
20/10/5 = .4 (or 2/5)
20/(10/5) = 10

how come I have in my homework:
1h^2 1h^2n^2
-------- = ------------
2mL^2 2mL^2
--------
n^2
a/b/c = a*c/b

no chalk and blackboard here...

Or go learn here:
https://www.mathsisfun.com/fractions_division.html

3. ## Re: Help with simple dividing

Originally Posted by DenisB
20/10/5 = .4 (or 2/5)
20/(10/5) = 10

a/b/c = a*c/b

no chalk and blackboard here...

Or go learn here:
https://www.mathsisfun.com/fractions_division.html
Let me refine my question:

see here: https://screenshots.firefoxuserconte...ea945191d9.png
How do I distinguish between 2 and 3?

Like why this happened? https://screenshots.firefoxuserconte...1ee6cbb0eb.png --->
https://screenshots.firefoxuserconte...e38429afd0.png

Thanks.

4. ## Re: Help with simple dividing

Once more; GO HERE:
https://www.mathsisfun.com/fractions_division.html

5. ## Re: Help with simple dividing

Originally Posted by IloveIl
Let me refine my question:

see here: https://screenshots.firefoxuserconte...ea945191d9.png
How do I distinguish between 2 and 3?

Like why this happened? https://screenshots.firefoxuserconte...1ee6cbb0eb.png --->
https://screenshots.firefoxuserconte...e38429afd0.png

Thanks.
You can think of a variable as though it has parentheses around it. Example:

$x = \dfrac{b}{c}$

$\dfrac{a}{x} = \dfrac{a}{(x)} = \dfrac{a}{\left( \tfrac{b}{c} \right) } = \dfrac{ac}{b}$

6. ## Re: Help with simple dividing

Originally Posted by DenisB

a/b/c = a*c/b

That's an error. Please see below.

no chalk and blackboard here...

Or go learn here:
https://www.mathsisfun.com/fractions_division.html
a/b/c =

(a/b)/c =

$\bigg(\dfrac{a}{b}\bigg) \div c \ =$

$\bigg(\dfrac{a}{b}\bigg)\bigg(\dfrac{1}{c}\bigg) \ =$

$\dfrac{a}{bc} \ \ or$

a/(bc)

7. ## Re: Help with simple dividing

Whoops...(a/b)/c...to the corner I go...