Monday

December 22, 2014

December 22, 2014

Posted by **Gracieh** on Thursday, January 11, 2007 at 3:37pm.

Cross multiply:

For example, 4/5 divided by 6/7 would be 28/30 or 14/15.

3/4 divided by 2/3 would be 9/8 or 1 and 1/8

Actually, the word cross multiply is a misnomer. What is being done is multiplying by the reciprocal

for instance 4/5 divide by 6/7 is the same as 4/5 multiplied by 7/6

3/4 divided by 2/3 is the same as 3/4 multiplied by 3/2

Both 14/15 and 9/8 are correct for the examples given; however, I don't call that cross multiplying.To divide fractions, invert the deonimator and multiply.

(4/5)/(6/7) = (4/5)*(7/6)=28/30=14/15

(3/4)/(2/3) = (3/4)*(3/2)= 9/8.

- Math -
**maria**, Wednesday, March 19, 2008 at 11:53am(3/4 : 4/5)x 4/6

- Math -
**dustin**, Monday, March 1, 2010 at 10:34pm.06 divided by 7.1

- Math -
**sarah**, Monday, March 15, 2010 at 6:50am15/4:5/3

**Answer this Question**

**Related Questions**

4th grade fractions - come up with 1 fraction up to 99 that has 2 different ...

5th Grade Math - I cannot get my brain around questions like this: 1/4 divided ...

Math - Divide. Write in simplest form. 5. 1/3 divided by 2/5=5/6 6. 1/9 divided ...

Math - Write the following decimals as fractions and find the Quotients. 4.5 ...

Math - could you tell me three equivalent fractions for each: 2/3 8/16 4/10 3/4 ...

to ms.sue, writeacher, martha, or vanessa - come up with 1 fraction up to 99 ...

division of fractions - Division of fractions is sometimes said to be ...

math - if a 13 by 9 inch brownie pan is divided into 20 equal size brownines, ...

Math-Fractions - How would I solve these two problems. (We have to simplify our ...

intro cal - the first 3 term of a geometric progression are k-4, 2k-4, 4k+4. ...