what is fraction for decimal .151515 (the 15 keeps on going)  TOPIC_SOLVED

Simple patterns, variables, the order of operations, simplification, evaluation, linear equations and graphs, etc.

what is fraction for decimal .151515 (the 15 keeps on going)

Postby nicknation on Wed Apr 01, 2009 10:47 pm

I would like to know what the fraction is for the decimal .151515 (the 15 keeps on going )?
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Re: what is fraction for decimal .151515 (the 15 keeps on going)

Postby Martingale on Wed Apr 01, 2009 11:50 pm

nicknation wrote:I would like to know what the fraction is for the decimal .151515 (the 15 keeps on going )?


let x=.1515...

then 100x=15.1515...

subtract x from 100x


100x=15.1515...
- x=.1515...

99x=15
x=15/99
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Re: what is fraction for decimal .151515 (the 15 keeps on going)

Postby nicknation on Sat Apr 04, 2009 5:36 pm

how did you know to times by 100?
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Re: what is fraction for decimal .151515 (the 15 keeps on going)

Postby Martingale on Sat Apr 04, 2009 5:37 pm

nicknation wrote:how did you know to times by 100?


because there are two digits that are repeating
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Re: what is fraction for decimal .151515 (the 15 keeps on going)

Postby nicknation on Tue Apr 07, 2009 4:49 pm

so use 100 for 0.345345345...?
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Re: what is fraction for decimal .151515 (the 15 keeps on going)  TOPIC_SOLVED

Postby Martingale on Tue Apr 07, 2009 6:21 pm

nicknation wrote:so use 100 for 0.345345345...?



there are 3 digits repeating here...use 1000
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Re: what is fraction for decimal .151515 (the 15 keeps on going)

Postby nicknation on Tue Apr 07, 2009 6:39 pm

sry thats what i ment thnx
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