Question

How can you subtract fractions with unlike denominators?

question: 1/5 - 9/10 =

please help

Answer 1

Answer: it would end up being 2/10-9/10 which is -7/10. If you meant it the other way around then it's 7/10.

Step-by-step explanation: with unlike denominators you can't do anything until they're alike. So you would find the least common denominator of both denominators which in this case would be 10. Since we already have one denominator of 10 we have to make the other denominator 10 if we want to continue with the equation. To make the denominator 10 you multiply it by two. You also have to multiply the numerator by 2 because of the balance rule " what you do to the bottom, you must do the top" and vice versa. Anyways that's how you get your answer. Hope this helped!!!

Answer 2

No, You can't. You have to make their denominators equal!

`-(7)/(10)`

Explanation:

So first, you make their denominators equal!

`(1*2)/(5*2) =(2)/(10)=(1)/(5)`

Multiplying both the numerator and denominator with the same number results in the same fraction, just un-simplified

So, we input it!

`(2)/(10) -(9)/(10) = -(7)/(10)`

There you go!

Hope you get better at math!(gets wayyyyyyyyyyy...y more complicated later)

Hope this helps!

See Ya!

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