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the same way you do when adding. Find a LCM(lowest common multiple) then do what you did to each denominator to the numerators. Example: 1/2 - 1/3. the LCM here for 2 & 3 is 6 so rewrite the problem with how you got 6. 1/2=3/6; 1/3=2/6

The answer then becomes 1/6

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Q: How do you make the denominators the same in fractions when subtracting?
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