I need how to write a proportion to solve

Question

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Answer 1

A proportion is where there is an equal vale between two fractions

 

Say that we have ¹/₂ and ²/₄

 

Take a look at this box:

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| xx|    |

| xx|    |

| xx|    |

| xx|    |

----------

 

I have one out of two pieces scribbled in, or ¹/₂

 

Now how about this box:

 

----------
| xx|    |
| xx|    |
| xx|    |
| xx|    |
----------

 

Here I have two out of four pieces scribbled in, or ²/₄

Note, however, that the exact same amount is scribbled.  That is what it means to be proportional: that despite however many pieces something is cut up into, the exact same amount is separate from the other.

 

We can create various proportions by multiplying by 1.  What do I mean by that?

well, 2 divided by 2 equals 1, right? well that's how the earlier proportion worked:

 

2   *   1     =    2

2   *   2     =    4

 

So we can say ¹/₂ is proportional to ²/₄

 

And we can do the same with 3/3, since 3 divided by 3 equals 1

3   *   1     =    3
3   *   2     =    6

 

So ¹/₂, ²/₄, and ³/₆ are all proportional to one another.

 

I hope this helps you understand them a bit better and maybe you can come up with some of your own from here.