Here's how you add


Step 1Can you add yet? Nope! The denominators don't match. We need a common denominator. So next we take both denominators and multiply them. Next, take each numerator and multiply it by the denominator of the other term. So, we multiply 1 by 9, and get 9, then we multiply 2 by 9 and get 18. Now for the second term. You multiply 7 by 2, and get 14, then multiply 2 by 9 and get 18. We now have a new problem, that looks like this:


Step 2Since our denominators match, we can add the numerators. 9 + 14 = 23 Answer:


Step 3Now, do we need to simplify this fraction? First, we attempt to divide it by 2... Nope. Try the next prime number, 3... Nope. Try the next prime number, 5... Nope. Try the next prime number, 7... Nope. Try the next prime number, 11... Nope. Try the next prime number, 13... Nope. Try the next prime number, 17... Nope. Try the next prime number, 19... No good. 19 is larger than 18. So we're done reducing. Congratulations! Here's your final answer to 1/2 + 7/9
