for 4/7-1/2 can 7 and 2 go into 14

- anonymous

for 4/7-1/2 can 7 and 2 go into 14

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- anonymous

Yep 7 and 2 both share a common denominator of 14 good job so let's start with 4/7
what do you have to multiply 7 by to get 14

- anonymous

2

- anonymous

Good now multiply 7 by 2 to get the denominator and multiply the numerator which is 4 by 2 as well

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## More answers

- anonymous

what does 4/7=?

- anonymous

8/14

- anonymous

Good job! Now lets work on the other fraction....

- anonymous

1/2 what do you have to multiply 2 by to get 14?

- anonymous

7

- anonymous

2/14

- anonymous

Yep so multiply 2 by 7 to get 14 as your denominator and do the same thing to the top of the fraction
what does 1/2=?

- anonymous

You still have to multiply 2*7 to finish correcting the fraction

- anonymous

wat

- anonymous

so 1/2=7/14

- anonymous

SO when I say do the same thing to the top of the fraction I mean multiply the top number of the fraction by the same number you multiplied by on the bottom of the fraction

- anonymous

ok the answer was 1 14

- anonymous

Your problem should now look like this:
8/14-7/14
subtract now and yep you got the answer right good job

- anonymous

u plz not say good job then i feel like a kindergatiner

- anonymous

ha ha sorry my bad

- anonymous

if the denominaters is 5 or 6 is th lcm 11

- anonymous

I think it would be 30....

- anonymous

how?

- anonymous

cause lcm is The smallest (non-zero) number that is a multiple of two or more numbers.

- anonymous

so 5*6=30 and there isn't any lower number that they both go into evenly other than 30

- anonymous

i meant lcd

- anonymous

oh ok lol no it would be 30 still for the same reason

- anonymous

$!@#

- anonymous

ha ha sorry

- anonymous

ok so 30 then wat im confused on this one

- anonymous

5*6=30
6*5=30
both 5 and 6 can't both go into anything that is lower than thirty

- anonymous

oh ok the top numbers are 1/5 and 5/6

- anonymous

Ok does the problem ask you to add or subtract them or what?

- anonymous

1/5=6/30
5/6=25/30

- anonymous

subtract

- anonymous

no add

- anonymous

ok so
6/30-25/30=-19/30

- anonymous

ok so adding it would be
6/30+25/30=31/30
simplify
1(1/30)

- anonymous

now if the denominaters were 5 and 2 couldnt the lcd be 10

- anonymous

yes

- anonymous

now if the denominaters were 5 and 2 couldnt the lcd be 10

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