Adding fractions... I think

Iamlost · #1 $Old$ August 1st, 2008, 11:53 PM

my daughter needs help with her math homework and I have no idea what I am doing....

George enjoys listening to 7/8 of his CD collection. Of the CDs he enjoys, 3/4 are considered Heavy Metal. What fraction of his Collection are heavy metal CDs that he enjoys? Explain why your answer is less than 3/4?

I am sure I can figure out most of it if you will just explain the procedure.

Quick · #2 $Old$ August 2nd, 2008, 07:28 AM

Quote:

Originally Posted by Iamlost $View Post$

my daughter needs help with her math homework and I have no idea what I am doing....

George enjoys listening to 7/8 of his CD collection. Of the CDs he enjoys, 3/4 are considered Heavy Metal. What fraction of his Collection are heavy metal CDs that he enjoys? Explain why your answer is less than 3/4?

I am sure I can figure out most of it if you will just explain the procedure.

To get $\frac{3}{4}$ of a hundred cd's, you say: $100\cdot\frac{3}{4}$ which equals 75. A similar process is used for this problem.

So George likes $\frac{7}{8}$ of his CD's, and $\frac{3}{4}$ of those are heavy metal.

So to find what franction he likes is heavy metal, you have to multiply $\frac{7}{8}$ by $\frac{3}{4}$

so: $\frac{7}{8}\cdot \frac{3}{4} = \frac{7\cdot 3}{8\cdot 4} = \frac{21}{32}$

So The fraction of cd's he enjoys that are heavy metal is $\frac{21}{32}$