It means you have to subtract fractions.
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Before adding or subtracting two fractions they are converted into like fractions. Explain with examples why this is necessary.
Subtracting a fraction is the same as adding its negative.
You multiply the fractions until the denominators are equal. Then, you subtract.
Ensure that the denominators are the same when adding or subtracting fractions.
They have to have the same denominator.