What was the Fraction?

 The Problem :

 We are considering fractions (in their lowest terms) which are divided on a calculator to give a decimal, which will usually be rounded.   

How quickly can you find out what the original fraction was, given the decimal? 

1. (a)  0.28;  (b)  0.352;  (c)  0.01625. 

2.  (a)  0.4545454545;  (b)  0.1621621622;  (c)  0.3846153846. 

3.  (a)  0.1764795882;  (b)  0.2894736842;  (c)  0.8139534884.  

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Last modified: June 18, 2007