Fractions

Gallo · #1 $Old$ May 2nd, 2008, 03:00 PM

"If a 3/4-cup serving of cereal provides your full daily value of vitamin B6, then what percentage of your daily value of vitamin B6 will you receive in 1/2 of a cup of cereal? First, solve the problem with the aid of either a picture, a percent diagram or both, explaining your reasoning. Then, solve the problem by setting up and solving an equation."

Moo · #2 $Old$ May 2nd, 2008, 03:06 PM

Hello,

Let P be the percentage of daily value contained in 1/2 of the cup.

3/4 cup ---------> 100%
1/2 cup ---------> P%

Then : $\frac{\frac 12}{\frac 34}=\frac{P}{100}$

--------> $\frac 1{\not 2} \cdot \frac{\not 4^2}{3}=\frac{P}{100}$

-------------> $\frac 23=\frac{P}{100}$

$\boxed{P=\frac{200}{3} \approx 66.67}$

Gallo · #3 $Old$ May 2nd, 2008, 03:11 PM

Boy that wuz fast!

Moo · #4 $Old$ May 2nd, 2008, 03:13 PM

Quote:

Originally Posted by Gallo $View Post$

Boy that wuz fast!

Hehe ^^'
Try to do the diagram on your own