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What is one third plus one seventh

What is one third plus one seventh
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What is one third plus one seventh

What is one third plus one seventh-example-1
User Krishonadish
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To do this, change into common denominators.  The common denominator is 21 so change the problem from 1/3 + 1/7 to 7/21 + 3/21.  This gives you 10/21.  It is already in simplest form.
User Benibur
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