How To Subtract Fractions With Unlike Denominators Algebra. (the denominators should now be the same.) 1) take the cross products and add/subtract them
Add or subtract fractions with different denominators. Add or subtract the fractions.
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Add the equivalent fractions that you wrote in step 2. Contrary to popular belief, there is a fast way to add and subtract fractions with unlike denominators, and it does not involve finding a common denominator.