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Question Number 12861 by Gauri last updated on 04/May/17

change0.356^−  into p/q form

$${change}\mathrm{0}.\mathrm{35}\overset{−} {\mathrm{6}}\:{into}\:{p}/{q}\:{form} \\ $$$$ \\ $$

Answered by mrW1 last updated on 04/May/17

x=0.356^� =0.356666666......  100x=35.66666666...=35+0.66666...  y=0.666666...  10y=6+0.666666...=6+y  9y=6  y=(6/9)=(2/3)  ⇒100x=35+(2/3)=((107)/3)  ⇒0.356^(−) =x=((107)/(300))

$${x}=\mathrm{0}.\mathrm{35}\bar {\mathrm{6}}=\mathrm{0}.\mathrm{356666666}...... \\ $$$$\mathrm{100}{x}=\mathrm{35}.\mathrm{66666666}...=\mathrm{35}+\mathrm{0}.\mathrm{66666}... \\ $$$${y}=\mathrm{0}.\mathrm{666666}... \\ $$$$\mathrm{10}{y}=\mathrm{6}+\mathrm{0}.\mathrm{666666}...=\mathrm{6}+{y} \\ $$$$\mathrm{9}{y}=\mathrm{6} \\ $$$${y}=\frac{\mathrm{6}}{\mathrm{9}}=\frac{\mathrm{2}}{\mathrm{3}} \\ $$$$\Rightarrow\mathrm{100}{x}=\mathrm{35}+\frac{\mathrm{2}}{\mathrm{3}}=\frac{\mathrm{107}}{\mathrm{3}} \\ $$$$\Rightarrow\mathrm{0}.\mathrm{35}\overline {\mathrm{6}}={x}=\frac{\mathrm{107}}{\mathrm{300}} \\ $$

Answered by ajfour last updated on 04/May/17

x=0.356^�   10x=3.56^� =3.566^�   9x=3.21=((321)/(100))  3x=((107)/(100)) ⇒ x=((107)/(300)) .

$${x}=\mathrm{0}.\mathrm{35}\bar {\mathrm{6}} \\ $$$$\mathrm{10}{x}=\mathrm{3}.\mathrm{5}\bar {\mathrm{6}}=\mathrm{3}.\mathrm{56}\bar {\mathrm{6}} \\ $$$$\mathrm{9}{x}=\mathrm{3}.\mathrm{21}=\frac{\mathrm{321}}{\mathrm{100}} \\ $$$$\mathrm{3}{x}=\frac{\mathrm{107}}{\mathrm{100}}\:\Rightarrow\:{x}=\frac{\mathrm{107}}{\mathrm{300}}\:. \\ $$

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