What is 7/20 + 7/10?
|
This is how you add
|
|||||||||||
Step 1We have to make sure the denominators are equal. Since 10 is evenly divided by 20, we can multiply just one term to get a common denominator. Multiply 7 by 2, and get 14, then we multiply 10 by 2 and get 20. So now our fractions look like this:
|
|||||||||||
Step 2Since our denominators match, we can add the numerators. 7 + 14 = 21 Now we have an answer.
|
|||||||||||
Step 3Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction? 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. 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. 23 is larger than 21. So we're done reducing. And we're done! Here's the final answer to 7/20 + 7/10
|