Let a/b-->{a,b}.

Then we define the following functions:

sum({a,b},{c,d})={ad+cb,bd};

product({a,b},{c,d})={ac,bd};

{a,{b,c}}={ac,b};

{{a,b},c}={a,bc};]]>

When one rational number is divided by the other, the reciprocal of the second is multiplied by the first.

Examples:-

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4 divided by 1 is 4 on top.

9 divided by 2 is 4 and a half on bottom.

Hence 40/45

]]>Why do u make 1/2 into 2/1?

Not just how. I guess one reason why is because it's hard to divide fractions, but it's easy to multiply them. I don't think that one was ever said.

]]>Take the 2 fractions you wish to divide. Flip one of them over. Then multiply the 2 new fractions together (multiply the top numbers, then multiply the bottom numbers). That will give you the correct answer.

4 1

_ Divided by _

9 2

becomes

4 2

_ Multiplied by _ <----- *This part has been flipped over*

9 1

and thus

4 * 2 = 8

9 * 1 = 9

So your answer would be 8/9

8

_

9

Example: 5 divided by 7 = 5/7, is the same as 5 multiplied by 1/7 = 5×1/7 = 5/7

So when dividing a fraction it is easier to multiply by 1/fraction.

Read Dividing Fractions

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Hope that helps.

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4 divided by 2 also equals 4 times 1/2 (2 turned upside down).

4/2 = 4 x 1/2

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So, 4/9 divided by 1/2 could also equal 4/9 times 2[/1] (1/2 turned upside down).

4/9 // 1/2 = 4/9 x 2[/1]

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Get it?

]]>(4/9) / (1/2) = (4/9) * (2/1)

4 * 2 = 8

-----------

9 * 1 = 9

But then again, I'm pretty terrible with algebra

]]>Take the 1/2. What we want is 1 / (1/2), which would be 1 / b. Multiply this by 2/2 (which is multiplying it by 1, thus not changing the value). You get (1 * 2) / ( (1/2)*2 ) = 2 / 1

So 1 / b = 2 / 1. a * 1 / b = 3/2 * 2 / 1.

]]>********************************************************************************Why do you need to turn the second fraction upside down when you are dividing a fraction by another fraction?

e.g 4 1

_ divided by _

9 2

Why do u make 1/2 into 2/1?

********************************************************************************Thats it...

(don't you just hate simple questions that u cant get the answer out of?)

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