First, you have to have a lowest common denominator.
Eg: 1/2 - 6/13
The lowest common denominator is 26, because 13 * 2 is 26.
You multiply 1/2 by 13, to make the denominator 26, which equals 13/26, then multiply 6/13 by 2 to get 12/26.
So the equation with the lowest common denominators now plugged in is:
13/26 - 12/26
Subtract the numerators (13 and 12), so the answer is 1/26.
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x=-1 ^ how do you know?
write both fractions with a common denominator 22/24 - 15/24 = 7/24
Like fractions are the fractions which have the same denominator and unlike fractions are the fractions which do not have the same denominator.
You basically have to learn separately how to do different things with fractions, including finding a common denominator; converting fractions to a different denominator; simplifying fractions; adding and subtracting fractions; multiplying fractions; dividing fractions.
We can only add or subtract fractions if they have the same denominators