What is 12/1 + 4/9?
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Here's how you add
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Step 1We have to make sure the denominators are equal. Since 1 is evenly divided by 9, we can multiply just one term to get a common denominator. Multiply 12 by 9, and get 108, then we multiply 1 by 9 and get 9. The problem now has new fractions to add:
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Step 2Since our denominators match, we can add the numerators. 108 + 4 = 112 This yields the answer
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Step 3The last step is to reduce the fraction if we can. To find out, we try dividing 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. 11 is larger than 9. So we're done reducing. And we're done! Here's the final answer to 12/1 + 4/9
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