HI all;

1/3 * 1/5 = 1 2/3.

My question is what does the answer really mean ie does it mean 1 fifth and 2 thirds of a fifth?

thanks.

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- May 1st 2011, 10:42 AManthonyesimple fraction issue
HI all;

1/3 * 1/5 = 1 2/3.

My question is what does the answer really mean ie does it mean 1 fifth and 2 thirds of a fifth?

thanks. - May 1st 2011, 10:49 AMtopsquark
For starters I don't like the "mixed" notation. However the answer is simply

*wrong*.

$\displaystyle \frac{1}{3} \cdot \frac{1}{5} = \frac{1}{15}$

There is no mixed number expression for this.

For the record, $\displaystyle 1 \frac{2}{3}$ is 1 + 2/3. This is in reference to some "unit" of length 1.

-Dan - May 1st 2011, 10:51 AMQuacky
I think the original question was 1/3 divided by 1/5, which gives the answer in the OP.

- May 1st 2011, 10:51 AManthonye
Oops I wrote the second fracton the wrong way it should be 5/1.

- May 1st 2011, 01:52 PMtopsquark
- May 2nd 2011, 01:51 AManthonye
could do with more info topsquark.

- May 2nd 2011, 02:03 AMtopsquark
The "1" in the mixed number means "1 unit" ie the number 1, not 1 unit of 1/5. 1 unit of 1/5 would be 1/5 and we would write it as so. Similarly the (2/3) represents (2/3) of a unit, not (2/3) of 1/5.

Does that make it clearer?

-Dan - May 2nd 2011, 02:18 AManthonye
Yeah think I see could do with a diagram if you can.

- May 2nd 2011, 02:33 AMtopsquark
- May 2nd 2011, 02:36 AManthonye
Ok thats what I needed to know no need for a diagram

Thanks for all the help. - May 2nd 2011, 02:48 AManthonye
maybe still something missing the original question asks how many 1/5 in a 1/3 resulting in 1 2/3 my brains telling me this is

1 whole fifth and 2/3 of a fifth I dont understand why. - May 2nd 2011, 03:10 AMtopsquark
- May 2nd 2011, 03:34 AManthonye
Ok thanks you had me wondering for a minute there.

Thanks again for the help topsquark.

You get what I mean this is deffinitly right yes.