Posted by Joe on Tuesday, January 19, 2010 at 6:42pm.
How would I solve these two problems. (We have to simplify our answer)
5/7 divided by 8/21
12/7 divided by 9/21

MathFractions  Reiny, Tuesday, January 19, 2010 at 6:54pm
I will do the first, you do the second
5/7 divided by 8/21
= (5/7)รท(8/21)
= (5/7)(21/8)
= 15/8 , (the 7 cancelled into the 21)

MathFractions  Kelly, Tuesday, January 19, 2010 at 7:00pm
I'd like to learn this. How did you get 15/8. Did you multiply 5 by 3 to get that?

MathFractions  Reiny, Tuesday, January 19, 2010 at 7:03pm
yes, to multiply fractions, you multiply the numerators, and you multiply the denominators.
e.g.
2/3 x 5/7 = 10/21
in your question of
(5/7)(21/8)
I had 105/56
= 15/8 after dividing top and bottom by 7

MathFractions  Kelly, Tuesday, January 19, 2010 at 7:12pm
that's cool. Thanks
Answer This Question
Related Questions
 Math  I have more math problems that I will to figure out. 2) 3.1 divided by 4 ...
 Estimation decimal quotient  Use compatible numbers to find the each quotient ,...
 Math  Write the following decimals as fractions and find the Quotients. 4.5 ...
 5th grade math  solve 1. 8/11 divided by 4 2. 3/8 divided by 3/10 3. 6 divided ...
 Math  How would you solve the following 2 equations for "X"? x4(divided by)12=...
 5th grade math (dividing fractions)  Hi.. I need help figuring out this problem...
 Algebra  I am really having problems with monomials: Please help! Simplify: 4x^...
 Algebra  I'm not sure how to solve these problems. Simplify (3xsquare  2x)...
 Tina  How do I solve this? (2/3^2 divided by 4/5 divided by 1/3? I keep trying ...
 math  To solve 3/4 divided by 2/5, Elisha writes, 3/4 divided by 2/5 is the ...
More Related Questions