Posted by **Erica** on Sunday, July 13, 2014 at 2:25pm.

Math 221 - Ms. Sue, Sunday, July 13, 2014 at 2:24pm

I've done several problems for you. Now it's your turn.

How do you think this problem should be solved?

Answer this Question I was thinking that I should multiply the numerators and denominators

- Math 221 -
**Steve**, Sunday, July 13, 2014 at 2:37pm
as with most problems involving fractions, work first with the denominators. They cannot be added or subtracted unless they all have the same denominator.

5/12 + 7/9

The GCD(12,9) = 36. So, what you have is

15/36 + 28/36

Now all the "units" are the same. Just as you cannot add apples and oranges, you cannot add twelfths and ninths. But you **can** add a bunch of 36ths. Since 15+28=43, the final answer is just 43/36.

Or, if you must, 1 7/36

## Answer This Question

## Related Questions

- Math 221 - Math 221 - Ms. Sue, Sunday, July 13, 2014 at 1:22pm (13/15) / (7/10...
- Math 221 - what is the perimeter of a square using 13ft. Math 221 - Ms. Sue, ...
- math fractions - •math - Ms. Sue, Sunday, November 16, 2014 at 12:39pm 12 •math...
- English - 1. What day is July 22? - It is Sunday. 2. What day is on July 22? - ...
- 4th grade math - I need help on how to write a mixed number as a fraction 4 9/17...
- 6th Grade Math Inequalities - The maximum weight allowed on The Wildcat ride is ...
- materials science engineering - Identify the [221] vector.(crystallographic ...
- Math 221 - Need help please explain how to get the answers for these two ...
- Math 221 - Need help please explain how to get the answers for these two ...
- math - Area of a rectangle = 221 m2; width = length = ? Should the answer be 13 ...

More Related Questions