does anyone know how to subtract diffrent fractions?

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- anonymous

does anyone know how to subtract diffrent fractions?

- schrodinger

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- anonymous

yes, give an example so i can help you with.

- anonymous

7/8-1/3

- anonymous

If you know how to add fractions, it's the same principle.

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- anonymous

13/24

- anonymous

ok, first you must find a common denominator between the teo, to make it the same, that way you'll be able to subtract the fraction. lets go over the steps.

- anonymous

kawsar, perhaps you should give the steps before you give the answer next time...

- anonymous

I was just waiting for you to do the steps.

- anonymous

ok, no prob :DD, ill do the rest.

- anonymous

lol! I saw you replying then thought, You're a superhero for a reason!

- anonymous

first you must find multiples for the two:
multiples of 8: 1, 2, 4, 8, 16, 24
multiples of 3: 1, 3, 6, 9, 12, 15, 18, 21, 24
as you can see they both have 24 in common, so this will be your new denominator.

- anonymous

however, when you switch your denominator, you must also switch your numerator during the process.

- anonymous

so this is how its done:

- anonymous

7/8-1/3 is the original problem., and we know that the denominator must be 24 for each fraction.
so to get 24 for the first fraction(7/8) we multiplied 8*3 to get 24, so we must also multiply 7*3, and we get 21. your new fraction is 21/24. now we must do the second one. do you think you can do it?

- anonymous

ok, well next we're going to find the numerator for the next fraction(1/3). we multiplied 3*8 to get 24, so we must aplly the same to the numerator. 1*8=8. so the new fraction if . Lastly, we subtract them.
21/24-8/24= 13/28. DONE! :DD

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