Will we lose marks if our fraction is different to theirs?

[livva]

Hi!

I just did a question about volume scale factors, and my way of working it out (not using ratios, which I hate) resulted in an answer of 1/2.37 and the answers gave the answer as 27/64.

It said to express it as a fraction.

These are pretty much the same, I was wondering if I would still get the mark if I did this on the exam?

[StumbleBum]

I really can't be too sure, because it all boils down to what accepted answers the examiners come up with. But they might take a mark off for that answer, as technically its not the exact same result (if you go to numerous decimal places). To be on the safe side, I would suggest learning how to do the ratio way and getting that answer. But with all that being said, they could very well give you the mark for it. Really just depends if you are willing to risk it.

[Greatness]

It depends what answers they will accept. In this case I don't think you'll get the mark, since they aren't equal at all.

[Daenerys Targaryen]

I assume that this question asked what 'fraction' of the shape is taken up by the smaller shape? Thus why you would need to answer in a fraction form. Not however you did it. And you really shouldn't have decimals in a fractions, defeats the whole purpose of fractions then.

[Stick]

Hi!

I just did a question about volume scale factors, and my way of working it out (not using ratios, which I hate) resulted in an answer of 1/2.37 and the answers gave the answer as 27/64.

It said to express it as a fraction.

These are pretty much the same, I was wondering if I would still get the mark if I did this on the exam?

Probably not, considering you have a calculator. Almost always the fractions tend to be relatively simple, or involve squared or cubed numbers in similarity problems. If you get some weird answer, it'd probably be a warning to check your working out.

[paulsterio]

Seriously, how hard is it to have all fractions in simplest form?

Just enter 100/200 into your CAS and press EXE/Enter and it spits out 1/2, geez, not that hard - don't be so lazy!

[livva]

I assume that this question asked what 'fraction' of the shape is taken up by the smaller shape? Thus why you would need to answer in a fraction form. Not however you did it. And you really shouldn't have decimals in a fractions, defeats the whole purpose of fractions then.

That bit about decimals in fractions defeating the whole point makes a lot of sense. Thank you for clarifying!