Because to add fractions, the denominators must be equal.
you subtract the numerators, and leeave the denomonators alone
Dissimilar fractions have different denominators.
Convert them to improper fractions and proceed.
The same way you would add or subtract whole numbers, leaving the denominators alone.
Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.
If the denominators are the same, subtract the numerators. If the denominators are different, convert them to equivalent fractions with a common denominator and subtract the numerators.
No. If the denominators are the same, you subtract the numerators. If the denominators are different you have to find the least common denominator.
Because you can't add or subtract fractions that have different denominators. Making them like fractions, by multiplying so the denominators are the same, you can add and/or subtract them.
If the fractions have the same denominator, add and subtract the numerators as if the denominators weren't there and put the result over that denominator. Reduce if possible. If the fractions have different denominators, find the LCM of the denominators and convert the fractions to equivalent fractions with like denominators. Then add and subtract the numerators as if the denominators weren't there and put the result over that denominator. Reduce if possible.
You cannot add or subtract fractions with different denominators. If the denominators are different then you need to work with equivalent fractions.
multiply the fractions until they have common denominators and then subtract them
Convert unlike fractions to equivalent fractions with common denominators by finding the LCM of the denominators.
Possible reasons: To add or subtract fractions, To compare fractions with different denominators.
YOU JUST CANT....go on you try it
by finding the common denominator of the fractions
It's the same thing as adding or subtracting normal fractions - just make sure both fractions have the same denominators (by either multiplying the denominators or simplifying the fraction - whichever the question needs).