what is 4.54 repeating as a fraction?

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13-02-2015
Mathematics

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what is 4.54 repeating as a fraction?

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Аноним Аноним · Answer 1 · 2015-02-13T02:30:55+01:00

[tex]n=0.\dot { 5 } \dot { 4 } \\ \\ \therefore \quad 100n=54.\dot { 5 } \dot { 4 } \\ \\ 100n-n\\ \\ =54.\dot { 5 } \dot { 4 } -0.\dot { 5 } \dot { 4 }[/tex]

[tex]\\ \\ =54\\ \\ =99n\\ \\ \therefore \quad 99n=54\\ \\ \therefore \quad n=\frac { 54 }{ 99 } =\frac { 18 }{ 33 } [/tex]

Now:

[tex]4.\dot { 5 } \dot { 4 } \\ \\ =4+\frac { 18 }{ 33 } \\ \\ =\frac { 132 }{ 33 } +\frac { 18 }{ 33 }[/tex]

[tex]\\ \\ =\frac { 150 }{ 33 } \\ \\ =\frac { 50 }{ 11 } \\ \\ \therefore \quad 4.\dot { 5 } \dot { 4 } =\frac { 50 }{ 11 } [/tex]