What is 72/63 + 5/9?
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This is how you add
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Step 1We have to make sure the denominators are equal. 63 goes into 9 evenly, so we only need to multiply one term to get a common denominator. Multiply 5 by 7, and get 35, then we multiply 9 by 7 and get 63. This gives us a new problem that looks like so:
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Step 2Since our denominators match, we can add the numerators. 72 + 35 = 107 So what's the answer so far?
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Step 3Can this fraction be reduced? First, we attempt to divide it by 2... No good. So next you try the next prime number, which is 3... No good. So next you try the next prime number, which is 5... No good. So next you try the next prime number, which is 7... No good. So next you try the next prime number, which is 11... No good. So next you try the next prime number, which is 13... No good. So next you try the next prime number, which is 17... No good. So next you try the next prime number, which is 19... No good. So next you try the next prime number, which is 23... No good. So next you try the next prime number, which is 29... No good. So next you try the next prime number, which is 31... No good. So next you try the next prime number, which is 37... No good. So next you try the next prime number, which is 41... No good. So next you try the next prime number, which is 43... No good. So next you try the next prime number, which is 47... No good. So next you try the next prime number, which is 53... No good. So next you try the next prime number, which is 59... No good. So next you try the next prime number, which is 61... No good. So next you try the next prime number, which is 67... No good. 67 is larger than 63. So we're done reducing. And we're done! Here's the final answer to 72/63 + 5/9
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