When converting repeating decimals into fractions, is it possible to sometimes get a fraction that (when converted to a decimal) almost looks like the decimal you started with? Is that common?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
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Problem 15.3P
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1) When converting repeating decimals into fractions, is it possible to sometimes get a fraction that (when converted to a decimal) almost looks like the decimal you started with? Is that common? I've run into this a few times.
 
2) If  you are not able to factor out a 2 to begin with, does that ALSO mean the thing is odd?

Is 3a2+7b+1 odd or even?

 

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