Just multiply the two denominators of your fractions, the answer you get is a common denominator.
yes you should use a common denominator when subtracting with fractions, it makes it much easier.
No only when adding or subtracting fractions a common denominator is needed
A Common Denominator
Yes.
A common denominator is needed when adding or subtracting fractions of different denominators.
You need a common denominator for both.
No, You only need a common denominator when adding or subtracting fractions.
a common denominator
Yes.
The numerator of the answer is the result of subtracting the numerators of the fractions, and the denominator of the fraction is the same as the common denominator.
No, you only need a common denominator when adding or subtracting fractions.
A common denominator.