Homework Help: Math (Algebra)

Posted by Lynn on Saturday, July 10, 2010 at 9:09pm.

How do you simplify the following fraction;
72
---
-68

I know the answer is
-18
---
-17

What I do not know is how this is the answer.The example I looked at did not tell me how it came to the answer. What do I do to find the answer?

Math (Algebra) - Ana, Saturday, July 10, 2010 at 9:11pm
divide the numerator by 4. Divide the denominator by 4.
Math (Algebra) - Lynn, Saturday, July 10, 2010 at 9:14pm
Thank you, but how do I determine what number to divide by? So that I an solve other fractions like this one. Must I still find the greatest common number to divide by?
Math (Algebra) - Ms. Sue, Saturday, July 10, 2010 at 9:55pm
Yes. You find the largest common divisor to reduce a fraction.

Example?

10/15
Divide by 5
10/15 = 2/3
Math (Algebra) - Quidditch, Sunday, July 11, 2010 at 12:23am
Be careful. You posted (72)/(-68) reduces to (-18)/(-17). You had a sign change in the numerator. Probably just a typo, but you might want to check.

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