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October 22, 2014

October 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

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