y = 0.16666. Main point by 10: 10y = 1.66666.. = 1 + 0.6666...= #1 + 2/3=5/3#.Divide by 10: #y=5/3xx1/10= 5/30=1/6#.

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First multiply by #10(10-1) = (100-10)# to acquire an integer.

The first multiplier that #10# is to transition the decimal representation one location to the left, for this reason the repeating section begins just after ~ the decimal point. Climate the #(10-1)# multiplier is provided to shift the digits one an ext place to the left (the size of the repeating pattern) and subtract the original to release the repeating tail.

#(100-10) * 0.1bar(6) = 16.bar(6) - 1.bar(6) = 15#

Then division both ends by #(100-10)# and simplify:

#0.1bar(6) = 15/(100-10) = 15/90 = (1*color(red)(cancel(color(black)(15))))/(6*color(red)(cancel(color(black)(15)))) = 1/6#


Answer connect
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Tony B
might 2, 2016

A #underline("very slightly")# different means of creating the solution

#0.16bar6" "->" " 1/6#


Explanation:

Note: if the 6 is repeating then a method of reflecting this is to placed a bar end the last 6 you write: #->" "0.16bar6#"~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Let #x=0.16bar6#

Then #10x=1.6bar6#Also #100x=16.6bar6#

#100x-10x->" "16.6bar6##color(white)(ggggggg2222222)underline(color(white)(.m)1.6bar6)" Subtract"##color(white)(222vvvvvvvvv22)underline(" "15.00" ")" "#

So #90x =15#

Divide both political parties by 90#" "x=15/90#

But #15/90->(15-:15)/(90-:15) = 1/6#

#=>x=0.16bar6" "->" " 1/6#


Answer attach
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EZ together pi
Jun 9, 2017

Short reduced methods because that finding the fraction:


Explanation:

The details of just how to transform a recurring decimal into a portion are presented in the other answers.

However, occasionally you just want a rapid method.Here is the brief cut.

If every the number after the decimal allude recur:

Write down the number (without repeating) together the numerator.

Write a #color(magenta)(9)# because that each number in the denominator. Leveling if possible.

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#0.77777.. = 0.barcolor(magenta)(7) = color(magenta)(7/9)" "(larr"one number recurs")/(larr"one 9")#

#0.613613613... = 0.bar(color(magenta)(613)) = color(magenta)(613/999)" "(larr"three digits recur")/(larr"three 9s")#

#6.412941294129.... = 6.bar(4129) = 6 4129/9999#

If just some number recur

Numerator: create down all the digits - non-recurring digits Denominator: a #9# because that each recurring and also a #0# because that each non-recurring digit

In #0color(red)(.524)color(blue)(666...)#, only the #color(blue)(6)# recurs if the #color(red)(524)# perform not.

#0color(red)(.524)color(blue)(666...) = 0color(red)(.524)color(blue)(bar6) = (5246-color(red)(524))/(color(blue)(9)color(red)(000)) = 4722/(color(blue)(9)color(red)(000))#