Mathematics OpenStudy (anonymous):

- 24/55 divided by 39/40 OpenStudy (asnaseer):

use the fact that:$\frac{a}{b}\div\frac{c}{d}=\frac{a}{b}\times\frac{d}{c}$ OpenStudy (anonymous):

do i cross multiply OpenStudy (asnaseer):

rewrite the division as a multiplication using the rule above and then cancel common factors between the numerators and the denominators. OpenStudy (anonymous):

how do i do that OpenStudy (asnaseer):

I suggest you go through this site to learn about how to manipulate fractions: http://www.aaamath.com/fra.html#topic23 OpenStudy (anonymous):

well i only ask how to set this up i never ask you to give me the answer. OpenStudy (asnaseer):

I have given you the information above. That site will help you understand how to do these types of questions as it also hows you lots of examples. OpenStudy (asnaseer):

*shows OpenStudy (anonymous):

ok thank you! OpenStudy (asnaseer):

in your case you have:$\frac{24}{55}\div\frac{39}{40}=\frac{24}{55}\times\frac{40}{39}$ OpenStudy (anonymous):

see the thing was i already had it up to this point I just wasnt sure what you meant for me to do next do i find the GCF of both? because if so i know how to do at least that. OpenStudy (asnaseer):

no - you just need to cancel out common factors between numerators and denominators. e.g. the following fraction can be simplified as follows:$\frac{12}{28}=\frac{3}{7}$because I divided both the numerator and the denominator by their common factor (4 in this case) OpenStudy (asnaseer):

remember that:$\frac{24}{55}\times\frac{40}{39}=\frac{24*40}{55*39}$so, for example, I can see that the 40 in the numerator and the 55 in the denominator can both be divided by 5 to get:$\frac{24*40}{55*39}=\frac{24*8}{11*39}$keep dividing the numerator and denominators by any common factors you can find. OpenStudy (anonymous):

ok thank! this website you told me that would help is it free? OpenStudy (asnaseer):

yes OpenStudy (asnaseer):

This might be better: http://www.mathsisfun.com/fractions_division.html OpenStudy (anonymous):

ok thanks! OpenStudy (asnaseer):

yw OpenStudy (anonymous):

one more thing when i turn the fracton into a mulitiplication what happens to the negative sign OpenStudy (asnaseer):

oh - I didn't realise you had a negative sign. the negative sign just gets placed in front of the overal fraction as follows:$-\frac{24}{55}\times\frac{40}{39}=-\frac{24*40}{55*39}$ OpenStudy (anonymous):

would it be - 64/143 OpenStudy (asnaseer):

perfect! OpenStudy (anonymous):

this is very had did you see how long it took me to find this out lol OpenStudy (asnaseer):

don't worry - we all had to start somewhere - with practice you will build confidence in these types of questions and I'm sure you'll be doing them in your sleep very soon! :) OpenStudy (anonymous):

trust me im far from that lol OpenStudy (asnaseer):

:D OpenStudy (asnaseer):

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