Monday

September 22, 2014

September 22, 2014

Posted by **Liz** on Wednesday, January 20, 2010 at 9:55am.

The problem is 7/16 - 3/20

First I have to find the common denominator which would be 80

How does the 7/16 become 35/80 (where does the 35 come from)

How does the 3/20 become a 12/80 (Where does the 12 come from)

35/80 minus 12/80

answer 23/80

- Math -
**bobpursley**, Wednesday, January 20, 2010 at 9:57am7/16*5/5= 35/80

3/20 * 4/4= 12/80

- Math -
**Liz**, Wednesday, January 20, 2010 at 10:01amI still don't get it???

- Math -
**bobpursley**, Wednesday, January 20, 2010 at 10:03amWhat you dont understand it how to get a common denominator...

http://www.mathsisfun.com/numbers/common-denominator.html

**Answer this Question**

**Related Questions**

math very urgent - First, do you get the same sum when you use 18 rather than 9 ...

HELP MATH - how would u simplify this problem i think it is 60 --- x^6 am i ...

Intermediate Algebra - Am I going in the right track? 8x -1/x + 5x - 3/2x = 16x^...

Please Help Me Math - Find the sum and express in simplest form. Show all work: ...

Math(Please Help) - x-2 6x ____ - _____ 3x+4 x+1 *You are supposed to simplify ...

math,correction please.. - (x)/(x-2) - (x+1)/(x) = (8)/(x^2-2x) I keep getting x...

math - First, why is the least common denominator of 3/4 and 4/8 not the ...

Math - I still do not understand fractions?????? 2/3 + 1/3 + 5/6 = divide all of...

Algebra - Please explain to me how to do these problems...Thanks 1. Find the ...

Math2(Please Help) - 4x 8 ___ - ______ x+2 x-1 *Simplify The Expression I'm ...