Thread: subtract fractions
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Old 05-09-2008, 10:00 AM
blair_alane blair_alane is offline
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Quote:
Originally Posted by recca View Post
Story problem 1 about a bird feeder: A bird feeder was filled with 3/4 of a full bag of bird seed. The birds ate 1/2 of what was in the bird feeder. What fraction of a full bag of bird seed did the birds eat?
So...they ate 1/2 of the 3/4 of the bag? You would have to multiply 3/4 and 1/2.... so... \frac{3}{4}\cdot\frac{1}{2}=\frac{3}{8} of the bag.

Quote:
Story problem 2 about a bird feeder: A bird feeder was filled was 3/4 of a full bag or bird seed. The birds ate 1/2 of what was in the bird feeder. What fraction of a full bag of bird seed is left in the bird feeder?
Now you just subtract that amount from one.
\frac{8}{8}-\frac{3}{8}=\frac{5}{8} left.

I hope that's right! Sorry if it's not....
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